Overthewire

Level 0: Connecting To The Network

ssh bandit0@bandit.labs.overthewire.org -p 2220

The Breakdown:

ssh

Secure Shell - Remote Access

-p

Port

Level 1: Find The Read Me File

ls

cat readme

exit

The Breakdown:

ls

List: Lists all files and directories

cat

Concatenate Files - Reads one or more files and copies them to standard output.

exit

Exit - Leaves the secure shell.

Level 2: Dashed Files

ls

cat ./-

cat ./-

For this command to work we need to specify that we are looking at the file - inside of the directory otherwise cat - will produce a different outcome.

Level 3: –spaces file–

ls

cat "./--in this file--"

exit

cat "./--in this file--"

Files that have spaces in them need to be in quotation mark so the shell knows it is a file.

Level 4: Outhere Directory (Hidden File)**

ls -a

cd ./outhere

cat :/Hiding_From_You

exit

ls -a

Lists are folders and files that are marked private as well as all that are not.

Level 5: Outhere Directory (Find Inside Multiple Files)

ls 

cd ./outhere

file ./*

cat ./-correctfile07

exit

file ./*

This checks each type of the files in the directory

Level 6: Outhere Directory (File With Specific Metrics)

ls

cd ./outhere

find . type-f -size 1033c ! -executable

cat ./couldbe06/.file01

exit

find . type-f -size 1033c ! -executable

find - searches the entire file system from the top to the bottom

-type f will find files only. -size 1033c exactly 1033 bytes. ! -executable excludes executable files

Level 7: Finding Somewhere On The Server

ls -la

find size -33c

find type -f user bandit7 -group bandit6 -size 33c

find type -f user bandit7 -group bandit6 -size 33c 2>/dev/null

cat /var/lib/abcd/info/bandit7.password

exit

find type -f user bandit7 -group bandit6 -size 33c

type -f: only regular files -user bandit7: Owned by that user. - group bandit6: Owned by that group.

2>/dev/null

Means “send error output to the discard bin.”

Level 8: Thousands Of Lines In a File

ls -l data.txt

grep millionth data.txt

exit

grep millionth data.txt

grep: search for lines that match a pattern. - millionth: the text to look for. - data.txt: the file to search in.

Level 9: Unique Line

sort data.txt

sort data.txt | uniq -u

exit

sort data.txt

sort: orders the lines so identical ones sit together

sort data.txt | uniq -u

|: feeds sorts output into the next command. - uniq -u prints only the lines that appear exactly once.

Level 10: Unique Character

strings data.txt

strings data.txt | grep =

exit

strings data.txt

strings: pulls out only printable text from a binary file