Ultimate and resource cheat sheets, explainers and notes — a personal reference pile.https://andrewfcode.github.io/cyber_lab_loghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/ultimatehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/ultimateThe short version of everything I study — key commands and facts by topic, each linking to the full chapter notes.Sun, 27 Sep 2026 00:00:00 GMTUltimate Cheatsheetcheat-sheetpowershelllinuxwindowsnetworkinghardwarehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-73-motherboard-form-factorshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-73-motherboard-form-factorsA+ Core 1 3.5 — ATX vs micro-ATX vs Mini-ITX: size, slots, power (20/24-pin) and shared ATX mounting.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwaremotherboardform-factorsatxmicro-atxmini-itxhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-74-motherboard-expansion-slotshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-74-motherboard-expansion-slotsA+ Core 1 3.5 — buses, PCI (parallel, 32/64-bit) vs PCIe (serial, lanes), keying, and safe card installation.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwaremotherboardpcipcieexpansion-slotsbuseshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-75-motherboard-connectionshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-75-motherboard-connectionsA+ Core 1 3.5 — main and PCIe power connectors, SATA/eSATA, front-panel/USB/TPM headers, and M.2.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwaremotherboardpower-connectorssataheadersm2https://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-76-motherboard-compatibilityhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-76-motherboard-compatibilityA+ Core 1 3.5 — Intel vs AMD sockets, zero-force CPU install, and multisocket server motherboards.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwaremotherboardcpusocketsintelamdserverhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-77-the-bioshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-77-the-biosA+ Core 1 3.5 — BIOS firmware, POST and boot, legacy BIOS vs UEFI, dual-BIOS flash, and safe setting changes.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarebiosuefifirmwarepostboothttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-78-bios-settingshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-78-bios-settingsA+ Core 1 3.5 — entering setup, boot order, USB control, fans/temps, Secure Boot, boot vs supervisor passwords, CMOS reset, virtualisation.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarebiosuefisecure-bootboot-orderpasswordshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-79-hsm-and-tpmhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-79-hsm-and-tpmA+ Core 1 3.5 — TPM (on-board crypto, root of trust, BitLocker) vs HSM (centralised keys and crypto offload).Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwaretpmhsmencryptionkeysroot-of-trusthttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-80-cpu-featureshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-80-cpu-featuresA+ Core 1 3.5 — 32-bit vs 64-bit (x86/x64), ARM architecture, and multi-core CPUs.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecpu32-bit64-bitarmcoreshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-81-expansion-cardshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-81-expansion-cardsA+ Core 1 3.5 — sound cards, integrated vs discrete GPUs, capture cards, NICs, and driver install best practice.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwareexpansion-cardsgpucapture-cardnicdrivershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-82-coolinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-82-coolingA+ Core 1 3.5 — fans and airflow, passive cooling, heat sinks, thermal paste vs pads, and liquid cooling.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecoolingfansheat-sinkthermal-pasteliquid-coolinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-83-multifunction-deviceshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-83-multifunction-devicesA+ Core 1 3.7 — MFD setup, drivers, PCL/PostScript, connectivity, sharing, print features, secure printing, and scanning.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwareprintersmultifunction-devicespclpostscriptsecure-printscanninghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-84-laser-printer-maintenancehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-84-laser-printer-maintenanceA+ Core 1 3.8 — laser imaging process, toner/OPC drum, cartridge and maintenance-kit replacement, calibration, and safe cleaning.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarelaser-printertonermaintenance-kitcalibrationcleaninghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-85-inkjet-printershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-85-inkjet-printersA+ Core 1 3.8 — inkjet operation, CMYK cartridges, print heads, feed rollers, duplex, plus carriage/belt and calibration.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwareinkjet-printercmykprint-headfeed-rollerscalibrationhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-86-inkjet-printer-maintenancehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-86-inkjet-printer-maintenanceA+ Core 1 3.8 — cleaning inkjet print heads, replacing CMYK cartridges, calibration, and clearing paper jams.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwareinkjet-printerprint-head-cleaningcmykcalibrationpaper-jamhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-87-thermal-printershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-87-thermal-printersA+ Core 1 3.8 — how thermal printers work, the feed assembly and heating element, thermal paper, and handling output safely.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarethermal-printerthermal-paperreceipt-printerheating-elementhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-88-thermal-printer-maintenancehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-88-thermal-printer-maintenanceA+ Core 1 3.8 — replacing thermal paper, cleaning the heating element with IPA, removing debris safely, and heat/fade sensitivity.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarethermal-printerthermal-paperheating-elementcleaninghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-89-impact-printershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-89-impact-printersA+ Core 1 3.8 — dot-matrix print heads, ribbons, tractor-feed paper, green bar paper, and multi-part carbonless copies.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwareimpact-printerdot-matrixtractor-feedmultipart-paperhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-90-impact-printer-maintenancehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-90-impact-printer-maintenanceA+ Core 1 3.8 — ribbon replacement, print head replacement, and continuous tractor-feed paper handling on dot-matrix printers.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwareimpact-printerdot-matrixribbonprint-headtractor-feedhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-59-advanced-keyboard-trickshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-59-advanced-keyboard-tricksTLCL ch. 8 — readline cursor movement/editing, kill and yank, tab completion, and command history/expansion.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheetlinuxbashshellcommand-linereadlinecommand-historytab-completionkill-and-yankhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-60-permissionshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-60-permissionsTLCL ch. 9 — users/groups/other, read/write/execute, chmod, umask, special permissions, su/sudo, chown/chgrp, and passwd.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheetlinuxbashshellcommand-linelinux-permissionschmodsudoumaskchownhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/networking-sysadmins-66-ipv4https://andrewfcode.github.io/cyber_lab_log/cheatsheets/networking-sysadmins-66-ipv4Networking for Sysadmins ch. 3 — IPv4 addressing, subnets/netmasks, viewing config on Windows/Debian/FreeBSD, private addressing/NAT, and troubleshooting.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheetnetworkingnetworking-for-sysadminsipv4subnettingnetmasknattroubleshootinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-65-adding-commandshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-65-adding-commandsMoL ch. 7 — management shells, snap-ins vs modules, module discovery/import, profile scripts, and the PowerShell Gallery.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheetpowershellmonth-of-luncheswindowsmodulessnap-insprofile-scriptspowershell-galleryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-66-objectshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-66-objectsMoL ch. 8 — what objects are, Get-Member, properties and methods, Sort-Object, Select-Object, and format-last discipline.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheetpowershellmonth-of-luncheswindowsobjectsget-membersort-objectselect-objecthttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-44-dns-in-detailhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-44-dns-in-detailTryHackMe module 6 — TLD/SLD/subdomain structure, A/AAAA/CNAME/MX/TXT records, and the DNS resolution journey with TTL caching.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmednsdomainsdns-recordsname-resolutionhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-45-http-in-detailhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-45-http-in-detailTryHackMe module 7 — HTTP/HTTPS, URL structure, requests/responses, HTTP methods, status codes, headers, and cookies.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmehttphttpsurlhttp-methodsstatus-codescookieshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-46-how-websites-workhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-46-how-websites-workTryHackMe module 8 — front end vs back end, HTML/CSS/JS, page source, sensitive data exposure, and HTML injection.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmehtmlcssjavascriptsensitive-data-exposurehtml-injectionhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-47-putting-it-all-togetherhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-47-putting-it-all-togetherTryHackMe module 9 — load balancers, CDNs, databases, WAFs, web server software, virtual hosts, and static vs dynamic content.Sun, 27 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmeload-balancercdnwafweb-serversvirtual-hostsbackendhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-45-motherboard-form-factorshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-45-motherboard-form-factorsFull class notes for A+ Core 1 3.5: choosing between ATX, micro-ATX and Mini-ITX by size, slots, power and mounting.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwaremotherboardform-factorsatxmicro-atxmini-itxhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-46-motherboard-expansion-slotshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-46-motherboard-expansion-slotsFull class notes for A+ Core 1 3.5: buses, PCI vs PCIe, parallel vs serial, PCIe lanes, and installing add-in cards safely.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwaremotherboardpcipcieexpansion-slotsbuseshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-47-motherboard-connectionshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-47-motherboard-connectionsFull class notes for A+ Core 1 3.5: main and PCIe power connectors, SATA/eSATA data, front-panel and USB/TPM headers, and M.2.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwaremotherboardpower-connectorssataheadersm2https://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-48-motherboard-compatibilityhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-48-motherboard-compatibilityFull class notes for A+ Core 1 3.5: Intel vs AMD sockets, installing a CPU, and multisocket server motherboards.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwaremotherboardcpusocketsintelamdserverhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-49-the-bioshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-49-the-biosFull class notes for A+ Core 1 3.5: BIOS firmware, POST and boot, legacy BIOS vs UEFI, dual-BIOS flash, and settings.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarebiosuefifirmwarepostboothttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-50-bios-settingshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-50-bios-settingsFull class notes for A+ Core 1 3.5: entering setup, boot order, USB control, fan and temperature, Secure Boot, passwords, CMOS reset and virtualisation.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarebiosuefisecure-bootboot-orderpasswordshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-51-hsm-and-tpmhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-51-hsm-and-tpmFull class notes for A+ Core 1 3.5: protecting cryptographic keys with a TPM (root of trust, BitLocker) and centralising them with an HSM.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwaretpmhsmencryptionkeysroot-of-trusthttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-52-cpu-featureshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-52-cpu-featuresFull class notes for A+ Core 1 3.5: 32-bit vs 64-bit (x86/x64), ARM architecture, and multi-core CPUs.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecpu32-bit64-bitarmcoreshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-53-expansion-cardshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-53-expansion-cardsFull class notes for A+ Core 1 3.5: sound cards, discrete GPUs, capture cards, NICs, and driver install best practice.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwareexpansion-cardsgpucapture-cardnicdrivershttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-54-coolinghttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-54-coolingFull class notes for A+ Core 1 3.5: fans and airflow, passive cooling, heat sinks, thermal paste and pads, and liquid cooling.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecoolingfansheat-sinkthermal-pasteliquid-coolinghttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-55-multifunction-deviceshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-55-multifunction-devicesFull class notes for A+ Core 1 3.7: MFD setup, drivers, PCL/PostScript, connectivity, sharing, print features, secure printing, and scanning.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwareprintersmultifunction-devicespclpostscriptsecure-printscanninghttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-56-laser-printer-maintenancehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-56-laser-printer-maintenanceFull class notes for A+ Core 1 3.8: the laser imaging process, toner/OPC drum, cartridge and maintenance-kit replacement, calibration, and cleaning.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarelaser-printertonermaintenance-kitcalibrationcleaninghttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-57-inkjet-printershttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-57-inkjet-printersFull class notes for A+ Core 1 3.8: inkjet operation, CMYK cartridges, print heads, feed rollers, duplex, and (beyond the clip) carriage/belt and calibration.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwareinkjet-printercmykprint-headfeed-rollerscalibrationhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-58-inkjet-printer-maintenancehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-58-inkjet-printer-maintenanceFull class notes for A+ Core 1 3.8: cleaning inkjet print heads, replacing CMYK cartridges, calibration, and clearing paper jams.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwareinkjet-printerprint-head-cleaningcmykcalibrationpaper-jamhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-59-thermal-printershttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-59-thermal-printersFull class notes for A+ Core 1 3.8: how thermal printers work, the feed assembly and heating element, thermal paper care, and handling output.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarethermal-printerthermal-paperreceipt-printerheating-elementhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-60-thermal-printer-maintenancehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-60-thermal-printer-maintenanceFull class notes for A+ Core 1 3.8: replacing thermal paper, cleaning the heating element, removing debris safely, and heat/fade sensitivity.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarethermal-printerthermal-paperheating-elementcleaninghttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-61-impact-printershttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-61-impact-printersFull class notes for A+ Core 1 3.8: dot-matrix print heads, ribbons, tractor-feed paper, and multi-part carbonless copies.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwareimpact-printerdot-matrixtractor-feedmultipart-paperhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-62-impact-printer-maintenancehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-62-impact-printer-maintenanceFull class notes for A+ Core 1 3.8: ribbon replacement, print head replacement, and continuous tractor-feed paper handling on dot-matrix printers.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwareimpact-printerdot-matrixribbonprint-headtractor-feedhttps://andrewfcode.github.io/cyber_lab_log/notes/linux-31-advanced-keyboard-trickshttps://andrewfcode.github.io/cyber_lab_log/notes/linux-31-advanced-keyboard-tricksFull class notes for TLCL ch. 8: readline cursor movement and editing, cut/paste (kill and yank), tab completion, and command history/expansion.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-noteslinuxbashreadlinecommand-historytab-completionkill-and-yankhttps://andrewfcode.github.io/cyber_lab_log/notes/linux-32-permissionshttps://andrewfcode.github.io/cyber_lab_log/notes/linux-32-permissionsFull class notes for TLCL ch. 9: users/groups/other, read/write/execute, chmod, umask, special permissions, su/sudo, chown/chgrp, and passwd.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-noteslinuxlinux-permissionschmodsudoumaskchownhttps://andrewfcode.github.io/cyber_lab_log/notes/networking-sysadmins-35-ipv4https://andrewfcode.github.io/cyber_lab_log/notes/networking-sysadmins-35-ipv4Full class notes for Networking for Sysadmins ch. 3: IPv4 addressing, subnets/netmasks, viewing config on Windows/Debian/FreeBSD, private addressing and NAT, and troubleshooting.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notesnetworkingipv4subnettingnetmasknattroubleshootinghttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-35-adding-commandshttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-35-adding-commandsFull class notes for MoL ch. 7: management shells, snap-ins vs modules, module discovery/import, profile scripts, and the PowerShell Gallery.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notespowershellmonth-of-luncheswindowsmodulessnap-insprofile-scriptspowershell-galleryhttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-36-objectshttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-36-objectsFull class notes for MoL ch. 8: what objects are, Get-Member, properties and methods, Sort-Object, Select-Object, and format-last discipline.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notespowershellmonth-of-luncheswindowsobjectsget-membersort-objectselect-objecthttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-16-dns-in-detailhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-16-dns-in-detailFull class notes for TryHackMe module 6: domain structure (TLD/SLD/subdomain), A/AAAA/CNAME/MX/TXT records, and the DNS resolution journey.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notestryhackmednsdomainsdns-recordsname-resolutionhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-17-http-in-detailhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-17-http-in-detailFull class notes for TryHackMe module 7: HTTP/HTTPS, URL structure, requests and responses, HTTP methods, status codes, headers, and cookies.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notestryhackmehttphttpsurlhttp-methodsstatus-codescookieshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-18-how-websites-workhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-18-how-websites-workFull class notes for TryHackMe module 8: front end vs back end, HTML/CSS/JS, page source, sensitive data exposure, and HTML injection.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notestryhackmehtmlcssjavascriptsensitive-data-exposurehtml-injectionhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-19-putting-it-all-togetherhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-19-putting-it-all-togetherFull class notes for TryHackMe module 9: load balancers, CDNs, databases, WAFs, web server software, virtual hosts, and static vs dynamic content.Sun, 27 Sep 2026 00:00:00 GMTLesson Noteclass-notestryhackmeload-balancercdnwafweb-serversvirtual-hostsbackendhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-57-display-typeshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-57-display-typesProfessor Messer A+ 220-1201 objective 3.1 — LCD backlights, TN vs IPS vs VA, OLED, mini LED local dimming, digitizers and styluses, inverters and the torch test.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwaredisplayslcdoleddigitizerhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-58-display-attributeshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-58-display-attributesProfessor Messer A+ 220-1201 objective 3.1 — pixel density and PPI maths, refresh rate vs FPS and V-sync, resolution and aspect ratio, and colour gamut percentages.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwaredisplaysresolutionrefresh-ratecolour-gamuthttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-59-network-cableshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-59-network-cablesProfessor Messer A+ 220-1201 objective 3.2 — twisted pair and why it is twisted, categories and distances, coax, UTP vs STP shielding codes, direct burial and plenum-rated cable.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecablingtwisted-pairplenumcoaxialhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-60-568a-568b-colourshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-60-568a-568b-coloursProfessor Messer A+ 220-1201 objective 3.2 — ANSI/TIA-568 and ISO/IEC 11801, the T568A and T568B pinouts, the four pins that differ, crimping checks and keystone jacks.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecablingt568at568brj45https://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-61-optical-fibrehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-61-optical-fibreProfessor Messer A+ 220-1201 objective 3.2 — light through core and cladding, ferrules and connectors, and multimode vs single-mode fibre on distance, source and core size.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecablingfibremultimodesingle-modehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-62-peripheral-cableshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-62-peripheral-cablesProfessor Messer A+ 220-1201 objective 3.2 — USB versions and speeds, connector types and USB-C, DB-9 serial, RS-232 console access, and Thunderbolt 1 to 4.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecablingusbusb-cthunderboltserialhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-63-video-cableshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-63-video-cablesProfessor Messer A+ 220-1201 objective 3.2 — HDMI, DisplayPort and its locking connector, DVI variants and single/dual link, VGA, and video over USB-C.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecablinghdmidisplayportdvivgahttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-64-storage-cableshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-64-storage-cablesProfessor Messer A+ 220-1201 objective 3.2 — SATA revisions and speeds, the one-to-one power and data connectors, no daisy chaining, and eSATA.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecablingsataesatastoragehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-65-adapters-and-convertershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-65-adapters-and-convertersProfessor Messer A+ 220-1201 objective 3.2 — DVI-D to HDMI and DVI-A to VGA compatibility, USB-to-Ethernet and USB-C-to-USB-A adapters, and USB hubs.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecablingadaptersconvertersdviusbhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-66-copper-connectorshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-66-copper-connectorsProfessor Messer A+ 220-1201 objective 3.2 — RJ11 and RJ45, F connectors and DOCSIS, punchdown blocks, USB and USB-C, Molex, Lightning, and DB-9/RS-232.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecablingrj11rj45connectorsmolexhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-67-fiber-connectorshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-67-fiber-connectorsProfessor Messer A+ 220-1201 objective 3.2 — ST bayonet, SC push-pull, and LC clip connectors for optical fibre, compared by mechanism and size.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarecablingfibrestsclchttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-68-an-overview-of-memoryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-68-an-overview-of-memoryProfessor Messer A+ 220-1201 objective 3.3 — RAM vs storage, DIMM and SO-DIMM, 64-bit data width, SDRAM, double data rate, and DDR3/DDR4/DDR5 compatibility and keying.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarememoryramdimmddrhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-69-memory-technologieshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-69-memory-technologiesProfessor Messer A+ 220-1201 objective 3.3 — parity memory and even-parity calculation, ECC memory, memory bandwidth in MT/s, and multi-channel RAM.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarememoryeccparitymultichannelhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-70-storage-deviceshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-70-storage-devicesProfessor Messer A+ 220-1201 objective 3.4 — hard drives and RPM, SSDs, PCIe and NVMe, SAS, mSATA and M.2 keying, flash memory formats, and optical drives.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarestoragessdnvmehard-driveflashhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-71-raidhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-71-raidProfessor Messer A+ 220-1201 objective 3.4 — RAID 0 striping, RAID 1 mirroring, RAID 5 and RAID 6 parity, and nested RAID 1+0, plus why RAID is not backup.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarestorageraidredundancyhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-72-computer-powerhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-72-computer-powerProfessor Messer A+ 220-1201 objective 3.6 — power supply safety, AC vs DC, amps/volts/watts, regional voltage, the 24-pin connector, redundant PSUs, modular cabling, sizing, and 80 PLUS efficiency.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserhardwarepower-supplypsuelectrical-safetyhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-58-seeing-the-world-as-the-shell-sees-ithttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-58-seeing-the-world-as-the-shell-sees-itTLCL chapter 7 — pathname, tilde, arithmetic, parameter and command expansion, plus double quotes, single quotes and backslash escaping.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheetlinuxbashshellexpansionquotingglobbingcommand-linehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-63-working-with-providershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-63-working-with-providersPowerShell providers and PSDrives — what they are, the built-in list, filesystem-style navigation, registry keys vs properties, and wildcards vs -LiteralPath.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheetpowershellmonth-of-luncheswindowsregistryprovidershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-64-the-pipelinehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-64-the-pipelinePowerShell's object pipeline — Export-Csv vs Export-Clixml, Out-File and Out-Printer, ConvertTo-Html, Stop-Process/Stop-Service safety, and common pipeline mistakes.Thu, 24 Sep 2026 00:00:00 GMTResource Cheatsheetpowershellmonth-of-luncheswindowspipelinecsvhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-29-display-typeshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-29-display-typesFull class notes for Professor Messer A+ 220-1201 objective 3.1: LCD backlights, TN vs IPS vs VA, OLED, mini LED local dimming, touchscreens and digitizers, and inverters.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwaredisplayslcdoleddigitizerhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-30-display-attributeshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-30-display-attributesFull class notes for Professor Messer A+ 220-1201 objective 3.1: pixel density and PPI maths, refresh rate and frames per second, resolution and aspect ratio, and colour gamut.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwaredisplaysresolutionrefresh-ratecolour-gamuthttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-31-network-cableshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-31-network-cablesFull class notes for Professor Messer A+ 220-1201 objective 3.2: twisted pair and why it is twisted, cable categories and distances, coax, UTP vs STP shielding codes, direct burial and plenum-rated cable.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecablingtwisted-pairplenumcoaxialhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-32-568a-568b-colourshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-32-568a-568b-coloursFull class notes for Professor Messer A+ 220-1201 objective 3.2: ANSI/TIA-568 and ISO/IEC 11801, the T568A and T568B pinouts, what differs between them, and wiring keystone jacks.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecablingt568at568brj45https://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-33-optical-fibrehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-33-optical-fibreFull class notes for Professor Messer A+ 220-1201 objective 3.2: how light travels through a fibre core and cladding, ferrules and connectors, and multimode versus single-mode fibre.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecablingfibremultimodesingle-modehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-34-peripheral-cableshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-34-peripheral-cablesFull class notes for Professor Messer A+ 220-1201 objective 3.2: USB versions and speeds, USB connector types and USB-C, DB-9 serial and RS-232 console access, and Thunderbolt 1 to 4.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecablingusbusb-cthunderboltserialhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-35-storage-cableshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-35-storage-cablesFull class notes for Professor Messer A+ 220-1201 objective 3.2: SATA revisions and speeds, the one-to-one SATA power and data connectors, and eSATA.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecablingsataesatastoragehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-36-adapters-and-convertershttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-36-adapters-and-convertersFull class notes for Professor Messer A+ 220-1201 objective 3.2: DVI-D to HDMI and DVI-A to VGA compatibility, USB-to-Ethernet and USB-C-to-USB-A adapters, and USB hubs.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecablingadaptersconvertersdviusbhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-37-copper-connectorshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-37-copper-connectorsFull class notes for Professor Messer A+ 220-1201 objective 3.2: RJ11 and RJ45, F connectors and DOCSIS, punchdown blocks, USB and USB-C, Molex, Lightning, and DB-9/RS-232.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecablingrj11rj45connectorsmolexhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-38-fiber-connectorshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-38-fiber-connectorsFull class notes for Professor Messer A+ 220-1201 objective 3.2: ST bayonet connectors, SC push-pull connectors, and compact LC connectors for optical fibre.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecablingfibrestsclchttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-39-an-overview-of-memoryhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-39-an-overview-of-memoryFull class notes for Professor Messer A+ 220-1201 objective 3.3: RAM vs storage, DIMM and SO-DIMM, 64-bit data width, SDRAM, double data rate, and DDR3/DDR4/DDR5 compatibility and keying.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarememoryramdimmddrhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-40-memory-technologieshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-40-memory-technologiesFull class notes for Professor Messer A+ 220-1201 objective 3.3: parity memory and even-parity calculation, ECC memory, memory bandwidth in MT/s, and multi-channel RAM.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarememoryeccparitymultichannelhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-41-storage-deviceshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-41-storage-devicesFull class notes for Professor Messer A+ 220-1201 objective 3.4: hard drives and RPM, SSDs, PCIe and NVMe, SAS, mSATA and M.2 keying, flash memory formats, and optical drives.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarestoragessdnvmehard-driveflashhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-42-raidhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-42-raidFull class notes for Professor Messer A+ 220-1201 objective 3.4: RAID 0 striping, RAID 1 mirroring, RAID 5 and RAID 6 parity, and nested RAID 1+0.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarestorageraidredundancyhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-43-computer-powerhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-43-computer-powerFull class notes for Professor Messer A+ 220-1201 objective 3.6: power supply safety, AC vs DC, amps/volts/watts, regional voltage, the 24-pin connector, redundant PSUs, modular cabling, wattage sizing, and 80 PLUS efficiency.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarepower-supplypsuelectrical-safetyhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-44-video-cableshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-44-video-cablesFull class notes for Professor Messer A+ 220-1201 objective 3.2: HDMI, DisplayPort and its locking connector, DVI variants and single/dual link, VGA, and video over USB-C.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamesserhardwarecablinghdmidisplayportdvivgahttps://andrewfcode.github.io/cyber_lab_log/notes/linux-30-expansion-and-quotinghttps://andrewfcode.github.io/cyber_lab_log/notes/linux-30-expansion-and-quotingFull class notes for TLCL chapter 7: pathname, tilde, arithmetic, parameter and command expansion, then double quotes, single quotes and backslash escaping.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-noteslinuxbashshellexpansionquotingglobbingcommand-linehttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-33-working-with-providershttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-33-working-with-providersFull class notes on PowerShell providers and PSDrives: what providers are, filesystem organisation, other data stores as drives, navigation, and wildcards vs literal paths.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notespowershellproviderspsdriveregistryfilesystemhttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-34-the-pipelinehttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-34-the-pipelineFull class notes on the PowerShell pipeline: connecting commands, exporting to CSV/XML, printing, ConvertTo-Html, system-modifying cmdlets, and common pipeline confusion points.Thu, 24 Sep 2026 00:00:00 GMTLesson Noteclass-notespowershellpipelinecsvxmlhtmlexportstop-processhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-55-internet-connection-typeshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-55-internet-connection-typesProfessor Messer A+ 220-1201 objective 2.7 — satellite (GEO vs LEO), fibre, cable and DOCSIS, DSL, cellular tethering vs hotspot, and WISPs.Wed, 23 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkinginternet-connection-typessatellitefibredslcellularhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-56-network-toolshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-56-network-toolsProfessor Messer A+ 220-1201 objective 2.8 — crimpers, Wi-Fi and spectrum analysers, tone generator and probe, punch-down tools, cable testers, loopback plugs, taps and SPAN.Wed, 23 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingnetwork-toolscablingtroubleshootinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-57-redirectionhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-57-redirectionTLCL chapter 6 — stdin/stdout/stderr, > >> 2> &> and 2>&1 ordering, /dev/null, group commands, pipelines, and the filters uniq, wc, grep, head, tail and tee.Wed, 23 Sep 2026 00:00:00 GMTResource Cheatsheetlinuxbashshellredirectionpipelinesfilterscommand-linehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-27-internet-connection-typeshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-27-internet-connection-typesFull class notes for Professor Messer A+ 220-1201 objective 2.7: satellite (GEO vs LEO), fibre, cable and DOCSIS, DSL, cellular tethering and hotspots, and WISPs.Wed, 23 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamessernetworkinginternet-connection-typessatellitefibredslcellularhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-28-network-toolshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-28-network-toolsFull class notes for Professor Messer A+ 220-1201 objective 2.8: crimpers, Wi-Fi and spectrum analysers, tone generator and probe, punch-down tools, cable testers, loopback plugs, taps and port mirrors.Wed, 23 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamessernetworkingnetwork-toolscablingtroubleshootinghttps://andrewfcode.github.io/cyber_lab_log/notes/linux-29-redirectionhttps://andrewfcode.github.io/cyber_lab_log/notes/linux-29-redirectionFull class notes for TLCL chapter 6: standard input, output and error, redirecting and combining streams, /dev/null, group commands, pipelines and the filters uniq, wc, grep, head, tail and tee.Wed, 23 Sep 2026 00:00:00 GMTLesson Noteclass-noteslinuxbashshellredirectionpipelinesfilterscommand-linehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-44-networkinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-44-networkingProfessor Messer A+ 220-1201 section 2 — IP, TCP/UDP and ports, wireless, network services, DNS/DHCP/VLAN/VPN, devices, IP addressing, connection types and tools.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-52-network-deviceshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-52-network-devicesProfessor Messer A+ 220-1201 objective 2.5 — routers, managed vs unmanaged switches, access points, patch panels, firewalls, PoE standards, cable/DSL/ONT and NICs.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingnetwork-devicespoehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-53-ipv4-and-ipv6https://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-53-ipv4-and-ipv6Professor Messer A+ 220-1201 objective 2.6 — IPv4 octets and binary, RFC 1918 private ranges and NAT, IPv6 hex notation, shortening rules, address types and /64.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingipv4ipv6nathttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-54-assigning-ip-addresseshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-54-assigning-ip-addressesProfessor Messer A+ 220-1201 objective 2.6 — IP address, subnet mask and gateway; static vs dynamic vs DHCP reservation; APIPA range and its ARP check.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingip-addressingdhcpapipahttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/networking-sysadmins-64-network-layershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/networking-sysadmins-64-network-layersLucas, Networking for System Administrators (2nd ed.) ch. 1 — the four layers, encapsulation, what changes at each hop, and troubleshooting commands by layer.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheetnetworkingnetwork-layersosi-modeltcp-iptroubleshootingnetworking-for-sysadminshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/networking-sysadmins-65-ethernethttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/networking-sysadmins-65-ethernetLucas, Networking for System Administrators (2nd ed.) ch. 2 — interfaces, autonegotiation, MTU and DF ping, ARP and NDP, VLAN terms and datalink error counters.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheetnetworkingethernetmtuarpvlansnetworking-for-sysadminshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-39-what-is-networkinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-39-what-is-networkingPre Security module 5, What is Networking? — networks and the internet, private vs public, IP vs MAC addresses, MAC spoofing, IPv4 vs IPv6, and ping.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmenetworkingip-addressesmac-addressespinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-40-intro-to-lanhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-40-intro-to-lanPre Security module 5, Intro to LAN — star, bus and ring topologies, switches vs hubs, routers, subnetting and address roles, ARP request/reply, and DHCP DORA.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmenetworkingtopologiessubnettingarpdhcphttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-41-osi-modelhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-41-osi-modelPre Security module 5, OSI Model — the seven layers and what each does, addresses and devices per layer, TCP vs UDP, and encapsulation.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmenetworkingosi-modeltcpudphttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-42-packets-and-frameshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-42-packets-and-framesPre Security module 5, Packets & Frames — packet vs frame, IP and TCP headers, the three-way handshake and close, UDP, and port numbers and ranges.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmenetworkingtcpudpportshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-43-extending-your-networkhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-43-extending-your-networkPre Security module 5, Extending Your Network — port forwarding, stateful vs stateless firewalls, VPNs and VPN protocols, routers, layer 2 vs layer 3 switches, and VLANs.Tue, 22 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmenetworkingfirewallsvpnvlanshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-24-network-deviceshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-24-network-devicesFull class notes for Professor Messer A+ 220-1201 objective 2.5: routers, managed and unmanaged switches, access points, firewalls, PoE and ISP devices.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamessernetworkingnetwork-devicespoehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-25-ipv4-and-ipv6https://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-25-ipv4-and-ipv6Full class notes for Professor Messer A+ 220-1201 objective 2.6: IPv4 structure and binary, RFC 1918 private ranges and NAT, IPv6 notation and /64 prefixes.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamessernetworkingipv4ipv6nathttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-26-assigning-ip-addresseshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-26-assigning-ip-addressesFull class notes for Professor Messer A+ 220-1201 objective 2.6: IP address, subnet mask and gateway; static addressing vs DHCP reservations; APIPA.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notesa-pluscomptiamessernetworkingip-addressingdhcpapipahttps://andrewfcode.github.io/cyber_lab_log/notes/networking-sysadmins-33-network-layershttps://andrewfcode.github.io/cyber_lab_log/notes/networking-sysadmins-33-network-layersFull class notes for Lucas, Networking for System Administrators (2nd ed.) ch. 1: the four network layers, encapsulation and troubleshooting layer by layer.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notesnetworkingnetwork-layersosi-modeltcp-iptroubleshootinghttps://andrewfcode.github.io/cyber_lab_log/notes/networking-sysadmins-34-ethernethttps://andrewfcode.github.io/cyber_lab_log/notes/networking-sysadmins-34-ethernetFull class notes for Lucas, Networking for System Administrators (2nd ed.) ch. 2: interfaces, autonegotiation, MTU, ARP and Neighbor Discovery, VLANs and datalink errors.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notesnetworkingethernetmtuarpvlanshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-11-what-is-networkinghttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-11-what-is-networkingFull class notes for TryHackMe Pre Security (2026 path) module 5, What is Networking?: networks and the internet, IP and MAC addresses, and ping.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notestryhackmenetworkingip-addressesmac-addressespinghttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-12-intro-to-lanhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-12-intro-to-lanFull class notes for TryHackMe Pre Security (2026 path) module 5, Intro to LAN: star, bus and ring topologies, switches and routers, subnetting, ARP and DHCP.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notestryhackmenetworkingtopologiessubnettingarpdhcphttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-13-osi-modelhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-13-osi-modelFull class notes for TryHackMe Pre Security (2026 path) module 5, OSI Model: the seven layers, what each one does, TCP versus UDP, and encapsulation.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notestryhackmenetworkingosi-modeltcpudphttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-14-packets-and-frameshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-14-packets-and-framesFull class notes for TryHackMe Pre Security (2026 path) module 5, Packets & Frames: packets vs frames, the TCP/IP model, TCP headers and the three-way handshake, UDP and ports.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notestryhackmenetworkingtcpudpportshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-15-extending-your-networkhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-15-extending-your-networkFull class notes for TryHackMe Pre Security (2026 path) module 5, Extending Your Network: port forwarding, stateful and stateless firewalls, VPNs, routers, switches and VLANs.Tue, 22 Sep 2026 00:00:00 GMTLesson Noteclass-notestryhackmenetworkingfirewallsvpnvlanshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-40-laptop-hardwarehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-40-laptop-hardwareProfessor Messer A+ 220-1201 lesson 1.1 — laptop batteries, keyboards, SO-DIMM memory, 2.5-inch vs M.2 storage, HDD-to-SSD cloning, wireless cards and antennas, biometrics, NFC and cameras.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamesserlaptopshardwarehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-41-mobile-device-connectionshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-41-mobile-device-connectionsProfessor Messer A+ 220-1201 lesson on connecting mobile devices — mini/micro-USB, Type-A, USB-C, Lightning, NFC, Bluetooth PAN, hotspot vs tethering.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessermobileusbbluetoothhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-42-mobile-device-accessorieshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-42-mobile-device-accessoriesProfessor Messer A+ 220-1201 lesson on mobile accessories — stylus, headsets and TRRS, speakers, webcams, docking station vs port replicator, trackpads and drawing pads.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessermobileaccessorieshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-43-mobile-device-managementhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-43-mobile-device-managementProfessor Messer A+ 220-1201 lesson on MDM — BYOD, COPE, CYOD, partitioning, policies and restrictions, the MDM console and IMEI, over-the-air sync and business app accounts.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessermobilemdmhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-45-introduction-to-iphttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-45-introduction-to-ipProfessor Messer A+ 220-1201 networking primer — encapsulation, TCP vs UDP, multiplexing, IP addresses, well-known vs ephemeral ports, reading a protocol decode.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingtcpudphttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-46-common-portshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-46-common-portsProfessor Messer A+ 220-1201 objective 2.1 — FTP, SSH, Telnet, SMTP, DNS, DHCP, HTTP/HTTPS, POP3, IMAP, SMB/CIFS, NetBIOS, LDAP and RDP port numbers.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingportshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-47-wireless-networking-protocolshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-47-wireless-networking-protocolsProfessor Messer A+ 220-1201 objective 2.2 — 802.11/Wi-Fi naming, frequency bands, channels and bandwidth, Bluetooth and ISM, RFID passive/active tags, and NFC.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingwirelesswifibluetoothrfidnfchttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-48-network-serviceshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-48-network-servicesProfessor Messer A+ 220-1201 objective 2.3 — DNS, DHCP, file/print sharing, email, syslog/SIEM, web, AAA, database, NTP, spam gateway, UTM, load balancer, proxy, SCADA/ICS, legacy, embedded and IoT.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingserversscadaiothttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-49-domain-name-system-dnshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-49-domain-name-system-dnsProfessor Messer A+ 220-1201 objective 2.4 — DNS hierarchy and root servers, dig/nslookup, resource records, A/AAAA, CNAME, MX, TXT, DKIM, SPF and DMARC.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingdnshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-50-dynamic-host-configuration-protocol-dhcphttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-50-dynamic-host-configuration-protocol-dhcpProfessor Messer A+ 220-1201 objective 2.4 — why DHCP exists, the DORA process with exact packet fields, scopes, pools and exclusions, and DHCP reservations.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingdhcphttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-51-vlans-and-vpnshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-51-vlans-and-vpnsProfessor Messer A+ 220-1201 objective 2.4 — broadcast domains, LANs, VLANs and inter-VLAN routing, VPN concentrators, client-to-site vs site-to-site VPN.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessernetworkingvlanvpnhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-59-before-you-beginhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-59-before-you-beginMonth of Lunches ch. 1 — why PowerShell matters, Windows PowerShell 5.1 vs PowerShell 7, installing and verifying PS7, lab setup, and how to study the book.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheetpowershellmonth-of-luncheswindowshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-60-meet-powershellhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-60-meet-powershellMonth of Lunches ch. 2 — engine vs host, console/Windows Terminal/VS Code, console setup, tab completion, PSReadLine history and predictions, and running elevated.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheetpowershellmonth-of-luncheswindowsvscodehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-61-using-the-help-systemhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-61-using-the-help-systemMonth of Lunches ch. 3 — Update-Help/Save-Help, finding commands with Get-Command, reading syntax and parameter sets, Get-Help options, about_ topics, and -WhatIf/-Confirm.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheetpowershellmonth-of-luncheswindowshelphttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-62-running-commandshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/powershell-62-running-commandsMonth of Lunches ch. 4 — command anatomy, Verb-Noun naming and approved verbs, cmdlet/function/alias/application, aliases cross-platform, shortcuts, external commands, errors, execution policy.Sun, 20 Sep 2026 00:00:00 GMTResource Cheatsheetpowershellmonth-of-luncheswindowshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-11-mobile-deviceshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-11-mobile-devicesExam tip: on the 220-1201 exam, display technologies (LCD, OLED, digitizers, inverters) moved to section 3 (Hardware). Section 1 is laptop hardware, connections and connectivity/management.Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-12-laptop-hardwarehttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-12-laptop-hardwareA laptop packs a full computer into a very small space. That's why it's the standard platform for anyone on the move — but it's also why laptops are harder to service:Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-13-mobile-device-connectionshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-13-mobile-device-connectionsAlmost everyone in an organisation carries a phone, a tablet or both. Each device needs a way to connect back to computers and networks — and different devices have historically used different connectors and standards.Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-14-mobile-device-accessorieshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-14-mobile-device-accessoriesFingers work well for tapping and swiping, but they're imprecise. A digital stylus works like a pen or pencil on the screen, giving much finer, more granular control — for handwriting, drawing, annotating documents…Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-15-mobile-device-managementhttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-15-mobile-device-managementAn organisation may have hundreds or thousands of phones and tablets. Some are company-owned; others belong to employees. They're outside the office, easily lost, and each needs the right apps, email settings and…Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-16-networkinghttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-16-networkingData sent across a network is wrapped in layers, like envelopes inside envelopes (Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-17-introduction-to-iphttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-17-introduction-to-ipNote: this video doesn't map directly to an exam objective. Messer presents it as a primer: everything in the networking domain builds on it, so it's worth learning well.Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-18-common-portshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-18-common-portsYou'll use these port numbers in two everyday situations:Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-19-wireless-networking-protocolshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-19-wireless-networking-protocolsWhen people say "wireless networking", they usually mean the network used at home or work to reach other devices and the internet. This is standardised by the IEEE — the Institute of Electrical and Electronics…Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-20-network-serviceshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-20-network-servicesA typical data centre holds rack after rack of equipment, with many different services running across those racks. This lesson works through the services you'd expect to find there — and several you'll meet…Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-21-domain-name-system-dnshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-21-domain-name-system-dnsDNS (Domain Name System) is one of the most critical services on any network. It lets us provide IP addresses when all we remember is a fully qualified domain name (FQDN).Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-22-dynamic-host-configuration-protocol-dhcphttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-22-dynamic-host-configuration-protocol-dhcpBefore automatic addressing, every device's IP configuration — IP address, subnet mask, default gateway, DNS servers and other settings — had to be entered manually. That was manageable with a small number of devices…Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-23-vlans-and-vpnshttps://andrewfcode.github.io/cyber_lab_log/notes/a-plus-core-1-23-vlans-and-vpnsA LAN (Local Area Network) is a group of devices connected together into a single broadcast domain. Send a broadcast from one device on that LAN, and every other device on that same LAN sees it.Sun, 20 Sep 2026 00:00:00 GMTLesson Notea-pluscomptiaclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/linux-24-what-is-the-shellhttps://andrewfcode.github.io/cyber_lab_log/notes/linux-24-what-is-the-shellWhen you type a command, something has to read it, work out what you mean and ask the operating system to do it. That something is the shell: a program whose whole job is to take keyboard commands and pass them to…Sun, 20 Sep 2026 00:00:00 GMTLesson Notelinuxclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/linux-25-navigationhttps://andrewfcode.github.io/cyber_lab_log/notes/linux-25-navigationLinux, like Windows, organises files into a hierarchy of directories (folders) that can contain files and further directories. The first directory is the root directory, written /. Everything else branches out from it.Sun, 20 Sep 2026 00:00:00 GMTLesson Notelinuxclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/linux-26-exploring-the-systemhttps://andrewfcode.github.io/cyber_lab_log/notes/linux-26-exploring-the-systemMost commands follow the same general shape:Sun, 20 Sep 2026 00:00:00 GMTLesson Notelinuxclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/linux-27-manipulating-files-and-directorieshttps://andrewfcode.github.io/cyber_lab_log/notes/linux-27-manipulating-files-and-directoriesA graphical file manager is fine for moving one file. But consider this task: copy every HTML file from one directory to another, but only files that don't exist in the destination or are newer than the copies there.…Sun, 20 Sep 2026 00:00:00 GMTLesson Notelinuxclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/linux-28-working-with-commandshttps://andrewfcode.github.io/cyber_lab_log/notes/linux-28-working-with-commandsWhen you type a name at the prompt, it can be any one of four things:Sun, 20 Sep 2026 00:00:00 GMTLesson Notelinuxclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-29-before-you-beginhttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-29-before-you-beginGraphical tools are good for doing one thing, once. They struggle with:Sun, 20 Sep 2026 00:00:00 GMTLesson Notepowershellclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-30-meet-powershellhttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-30-meet-powershellPowerShell is two things working together:Sun, 20 Sep 2026 00:00:00 GMTLesson Notepowershellclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-31-using-the-help-systemhttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-31-using-the-help-systemPowerShell has thousands of commands, and every module you install adds more. No one memorises them. Skilled PowerShell users are skilled at finding and reading help. The book is emphatic on this point: if you learn…Sun, 20 Sep 2026 00:00:00 GMTLesson Notepowershellclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-32-running-commandshttps://andrewfcode.github.io/cyber_lab_log/notes/powershell-32-running-commandsMany people avoid PowerShell because they think it means "programming". But most day-to-day PowerShell is simply typing commands and pressing Enter, just as you would in CMD or Bash. A script is only a text file of…Sun, 20 Sep 2026 00:00:00 GMTLesson Notepowershellclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-01-course-introductionhttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-01-course-introductionThe Practical Help Desk course takes someone with no IT experience to the point where they can do the real work of a Tier 1 help desk technician. It's also the foundation TCM recommends before its more advanced…Sun, 20 Sep 2026 00:00:00 GMTLesson Notehelp-desktcmclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-02-intro-to-ithttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-02-intro-to-itInformation Technology (IT) is the people, processes and technology an organisation uses to create, store, move and protect information. In practice, IT exists to keep the business working. The payroll team needs…Sun, 20 Sep 2026 00:00:00 GMTLesson Notehelp-desktcmclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-03-intro-to-computinghttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-03-intro-to-computingA computer is built from billions of tiny switches (transistors). A switch has two reliable states: off and on, which we write as 0 and 1.Sun, 20 Sep 2026 00:00:00 GMTLesson Notehelp-desktcmclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-04-desktop-computer-components-and-repairhttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-04-desktop-computer-components-and-repairElectrostatic discharge (ESD) is the sudden flow of static electricity between two objects at different charge levels. You feel a shock at around 3,000 volts, but chips can be damaged by a few hundred — far below…Sun, 20 Sep 2026 00:00:00 GMTLesson Notehelp-desktcmclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-05-laptop-computer-components-and-repairhttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-05-laptop-computer-components-and-repairLimited — RAM and storage sometimes; CPU and GPU almost never (soldered)Sun, 20 Sep 2026 00:00:00 GMTLesson Notehelp-desktcmclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-06-operating-systemshttps://andrewfcode.github.io/cyber_lab_log/notes/tcm-help-desk-06-operating-systemsAn operating system (OS) manages the hardware and gives programs a consistent, safe way to use it. Without an OS, every application would need its own code to drive the disk, network card and screen — and nothing…Sun, 20 Sep 2026 00:00:00 GMTLesson Notehelp-desktcmclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-07-introduction-to-cyber-securityhttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-07-introduction-to-cyber-securityNote: these notes are written from the module's topic outline, not from the rooms themselves. Room names and exercise specifics aren't reproduced — cross-check against the rooms as you work through them.Sun, 20 Sep 2026 00:00:00 GMTLesson Notetryhackmeclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-08-computer-fundamentalshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-08-computer-fundamentalsNote: rooms in this module include Inside a Computer System and Computer Types. These notes are written from the module outline — cross-check room specifics as you go.Sun, 20 Sep 2026 00:00:00 GMTLesson Notetryhackmeclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-09-operating-system-basicshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-09-operating-system-basicsNote: rooms in this module include Operating Systems: Introduction and Windows Basics, with Linux covered alongside. These notes are written from the module outline — cross-check room specifics as you go.Sun, 20 Sep 2026 00:00:00 GMTLesson Notetryhackmeclass-noteshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-10-software-basicshttps://andrewfcode.github.io/cyber_lab_log/notes/tryhackme-10-software-basicsNote: these notes are written from the module's topic outline (data representation, Python, JavaScript, databases and SQL). Cross-check room specifics as you go.Sun, 20 Sep 2026 00:00:00 GMTLesson Notetryhackmeclass-noteshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-39-mobile-deviceshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/a-plus-core-1-39-mobile-devicesProfessor Messer A+ 220-1201 section 1 — laptop hardware, connecting and accessorising mobile devices, cellular and wireless connectivity, and MDM.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheeta-pluscomptiamessermobilelaptopshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-01-best-friendshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-01-best-friendsCode ch. 1 — Morse code as a first code: dots, dashes and timing, why common letters are short, and what a code actually is.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingencodinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-02-codes-and-combinationshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-02-codes-and-combinationsCode ch. 2 — counting Morse combinations, why two symbols of length n give 2ⁿ codes, and decoding with a binary tree.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingbinaryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-03-braille-and-binary-codeshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-03-braille-and-binary-codesCode ch. 3 — Braille's six-dot cells as a binary code, 64 combinations, and shift/escape codes that change what the next symbol means.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingencodinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-04-anatomy-of-a-flashlighthttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-04-anatomy-of-a-flashlightCode ch. 4 — a circuit from battery, bulb and switch: voltage, current, resistance, Ohm's law, power, series vs parallel, conductors and insulators.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingelectricityhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-05-communicating-around-cornershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-05-communicating-around-cornersCode ch. 5 — signalling by wire between houses: circuits need a return path, shared commons and earth grounds, and why long wires dim the signal.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingelectricityhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-06-logic-with-switcheshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-06-logic-with-switchesCode ch. 6 — Boolean algebra (AND, OR, NOT), sets and conditions, and how switches in series and parallel perform logic.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputinglogichttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-07-telegraphs-and-relayshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-07-telegraphs-and-relaysCode ch. 7 — the telegraph key and sounder, why long lines fail, and the relay: a switch flipped by electricity that regenerates the signal.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingelectricityhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-08-relays-and-gateshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-08-relays-and-gatesCode ch. 8 — building AND, OR, NOT, NAND and NOR gates from relays, truth tables, gate symbols and De Morgan's laws.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputinglogic-gateshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-09-our-ten-digitshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-09-our-ten-digitsCode ch. 9 — why we count in tens, Roman numerals vs positional notation, the importance of zero, and how place value works in any base.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingnumber-systemshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-10-alternative-10shttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-10-alternative-10sCode ch. 10 — counting in other bases: octal, base 4 and binary, converting between them, and where octal still shows up in Linux permissions.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingnumber-systemsbinaryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-11-bit-by-bit-by-bithttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-11-bit-by-bit-by-bitCode ch. 11 — the bit as a yes/no answer, 2ⁿ possibilities, how many bits a choice needs, barcodes with check digits, and QR codes.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingbinaryinformationhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-12-bytes-and-hexadecimalhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-12-bytes-and-hexadecimalCode ch. 12 — the 8-bit byte, nibbles, hexadecimal digits and conversion, hex notation, and where hex appears in everyday IT.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputinghexadecimalbinaryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-13-from-ascii-to-unicodehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-13-from-ascii-to-unicodeCode ch. 13 — text as numbers: Baudot and shift codes, 7-bit ASCII and control characters, code pages, Unicode, and UTF-8/16/32.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingencodingunicodehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-14-adding-with-logic-gateshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-14-adding-with-logic-gatesCode ch. 14 — binary addition, XOR, the half adder and full adder, chaining them into an 8-bit ripple-carry adder, and overflow.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputinglogic-gatesbinaryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-15-is-this-for-realhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-15-is-this-for-realCode ch. 15 — from mechanical calculators and relay machines to vacuum tubes, transistors, integrated circuits and the microprocessor.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputinghistorytransistorshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-16-but-what-about-subtractionhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-16-but-what-about-subtractionCode ch. 16 — subtracting with an adder: nines' complement, ones' and two's complement, signed numbers, and overflow.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingbinaryarithmetichttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-17-feedback-and-flip-flopshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-17-feedback-and-flip-flopsCode ch. 17 — feeding outputs back to inputs: the oscillator (a clock), R-S flip-flops, D latches, edge-triggered flip-flops, dividers and counters.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputinglogic-gatesmemoryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-18-let-s-build-a-clockhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-18-let-s-build-a-clockCode ch. 18 — a digital clock from counters: binary-coded decimal, dividing a fast oscillator down to 1 Hz, and driving seven-segment displays.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputinglogic-gatescountershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-19-an-assemblage-of-memoryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-19-an-assemblage-of-memoryCode ch. 19 — building RAM from latches: addresses, decoders to write, selectors to read, address lines vs capacity, and why RAM is volatile.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingmemoryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-20-automating-arithmetichttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-20-automating-arithmeticCode ch. 20 — adder plus memory plus a counter: stepping through memory automatically, then storing instruction codes alongside data.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingcpumachine-codehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-21-the-arithmetic-logic-unithttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-21-the-arithmetic-logic-unitCode ch. 21 — the ALU: add/subtract plus AND, OR, XOR selected by a function code, with status flags for carry, zero and sign.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingcpulogichttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-22-registers-and-busseshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-22-registers-and-bussesCode ch. 22 — registers as fast on-chip storage, the data/address/control busses that move bytes around, three-state buffers, and the fetch-execute cycle.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingcpuhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-23-cpu-control-signalshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-23-cpu-control-signalsCode ch. 23 — the control unit: turning opcodes into the timed signals that steer registers, ALU and memory, instruction sets and microcode.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingcpumachine-codehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-24-loops-jumps-and-callshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-24-loops-jumps-and-callsCode ch. 24 — changing the program counter: unconditional and conditional jumps, loops, the stack, and CALL/RETURN for subroutines.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingcpumachine-codehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-25-peripheralshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-25-peripheralsCode ch. 25 — getting data in and out: I/O ports vs memory-mapped I/O, polling vs interrupts, DMA, and device controllers.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingiohardwarehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-26-the-operating-systemhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-26-the-operating-systemCode ch. 26 — why raw hardware needs an OS: the kernel, system calls, processes and multitasking, memory management, file systems and drivers.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingoperating-systemshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-27-codinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-27-codingCode ch. 27 — from machine code to high-level languages: assemblers, compilers vs interpreters, high-level constructs, libraries and APIs.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingprogramminghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-28-the-world-brainhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/code-28-the-world-brainCode ch. 28 — graphics, sound, networks, the internet and the web tying it all together, plus a look at where computing goes next.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetcodepetzoldcomputingnetworkinginternethttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-52-what-is-the-shellhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-52-what-is-the-shellThe Linux Command Line ch. 1 — shell vs terminal, reading the prompt, history and editing keys, copy and paste, and your first commands.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetlinuxbashthe-linux-command-linehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-53-navigationhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-53-navigationThe Linux Command Line ch. 2 — the single directory tree, pwd, ls and cd, absolute vs relative paths, shortcuts, and the rules for filenames.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetlinuxbashthe-linux-command-linehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-54-exploring-the-systemhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-54-exploring-the-systemThe Linux Command Line ch. 3 — ls options and the long listing, command syntax, identifying files with file, paging with less, and a tour of the directory tree.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetlinuxbashthe-linux-command-linehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-55-manipulating-files-and-directorieshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-55-manipulating-files-and-directoriesThe Linux Command Line ch. 4 — wildcards and character classes, mkdir, cp, mv and rm with their key options, and hard vs symbolic links.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetlinuxbashthe-linux-command-linehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-56-working-with-commandshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/linux-56-working-with-commandsThe Linux Command Line ch. 5 — the four kinds of command, type and which, help, man, apropos, whatis and info, and making your own aliases.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheetlinuxbashthe-linux-command-linehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-29-course-introductionhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-29-course-introductionTCM Practical Help Desk section 1 — what the course covers, how lessons are formatted, lab requirements, and how to ask for help well.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheethelp-desktcmit-fundamentalshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-30-intro-to-ithttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-30-intro-to-itTCM Practical Help Desk section 2 — what IT does, the IT org chart and roles, help desk tiers and responsibilities, and reading job postings.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheethelp-desktcmit-fundamentalscareershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-31-intro-to-computinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-31-intro-to-computingTCM Practical Help Desk section 3 — binary, bits and bytes, character encoding, logic gates and how a CPU computes, compilers and abstraction.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheethelp-desktcmcomputingbinaryhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-32-desktop-computer-components-and-repairhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-32-desktop-computer-components-and-repairTCM Practical Help Desk section 4 — ESD, CPU, RAM, drives, PSU, GPU, motherboard, ports and peripherals, POST and the BIOS, plus commands to inspect hardware.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheethelp-desktcmhardwarehttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-33-laptop-computer-components-and-repairhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-33-laptop-computer-components-and-repairTCM Practical Help Desk section 5 — opening laptops safely, batteries, SODIMM RAM, laptop drives, the CMOS battery and other internal parts.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheethelp-desktcmhardwarelaptopshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-34-operating-systemshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tcm-help-desk-34-operating-systemsTCM Practical Help Desk section 6 — what an OS does, kernel vs userland, file systems and partition styles, and file types, with commands to check each.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheethelp-desktcmoperating-systemsfile-systemshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-35-introduction-to-cyber-securityhttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-35-introduction-to-cyber-securityPre Security module 1 — what cyber security is, offensive vs defensive work, core terms, career paths, and staying on the right side of the law.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmecyber-securitycareershttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-36-computer-fundamentalshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-36-computer-fundamentalsPre Security module 2 — what's inside a computer, how components connect, the boot process, and the many types of computer you'll need to secure.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmehardwarecomputinghttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-37-operating-system-basicshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-37-operating-system-basicsPre Security module 3 — what an OS does, Windows basics (interface, system tools, apps, files, security settings) and Linux basics, with the commands for each.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmewindowslinuxoperating-systemshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-38-software-basicshttps://andrewfcode.github.io/cyber_lab_log/cheatsheets/tryhackme-38-software-basicsPre Security module 4 — data representation, Python and JavaScript fundamentals side by side, and databases with SQL.Fri, 18 Sep 2026 00:00:00 GMTResource Cheatsheettryhackmepythonjavascriptsqlhttps://andrewfcode.github.io/cyber_lab_log/explainers/what_is_a_vmhttps://andrewfcode.github.io/cyber_lab_log/explainers/what_is_a_vmA One Page Explainer Of What A VM IsThu, 17 Sep 2026 00:00:00 GMTExplainerVMLab MAchinehttps://andrewfcode.github.io/cyber_lab_log/notes/on-writing-things-downhttps://andrewfcode.github.io/cyber_lab_log/notes/on-writing-things-downSun, 13 Sep 2026 00:00:00 GMTLesson Notemetalearninghttps://andrewfcode.github.io/cyber_lab_log/notes/cache-invalidation-is-a-naming-problemhttps://andrewfcode.github.io/cyber_lab_log/notes/cache-invalidation-is-a-naming-problemWhy content-addressed keys dissolve most of the difficultyTue, 08 Sep 2026 00:00:00 GMTLesson Notecachingarchitecturehttps://andrewfcode.github.io/cyber_lab_log/explainers/what-happens-when-you-type-a-urlhttps://andrewfcode.github.io/cyber_lab_log/explainers/what-happens-when-you-type-a-urlDNS, TCP, TLS and the first byte, in the order they actually occurThu, 03 Sep 2026 00:00:00 GMTExplainernetworkingdnshttphttps://andrewfcode.github.io/cyber_lab_log/explainers/how-oauth-actually-workshttps://andrewfcode.github.io/cyber_lab_log/explainers/how-oauth-actually-worksThe authorisation code flow, step by step, without the diagrams that explain nothingSat, 22 Aug 2026 00:00:00 GMTExplainerauthwebsecurity