Bandit Level 8-9@overthewire.org

Description

The password for the next level is stored in the file data.txt and is the only line of text that occurs only once

Current level credentials

Key	Value
Server-name:	bandit.labs.overthewire.org
Port:	2220
User:	bandit8
Password:	TESKZC0XvTetK0S9xNwm25STk5iWrBvP

Log in

sshpass -p TESKZC0XvTetK0S9xNwm25STk5iWrBvP ssh -p 2220 bandit8@bandit.labs.overthewire.org

Note: You might need to install sshpass before using it. The ssh command can also be used on its own. If so, copy-paste the password when requested.

Hints And Solution

Hint(s)

Hint 1Hint 2

In the manpage for uniq, look up what options you need display only unique lines.

Does uniq need anything in order to function? Does it matter whether duplicate lines are adjacent or not?

Solution

bandit8@bandit:~$ ls -al  
total 56  
drwxr-xr-x  2 root    root     4096 May  7  2020 .  
drwxr-xr-x 41 root    root     4096 May  7  2020 ..  
-rw-r--r--  1 root    root      220 May 15  2017 .bash_logout  
-rw-r--r--  1 root    root     3526 May 15  2017 .bashrc  
-rw-r-----  1 bandit9 bandit8 33033 May  7  2020 data.txt  
-rw-r--r--  1 root    root      675 May 15  2017 .profile  
bandit8@bandit:~$ cat data.txt | sort | uniq -u  # (1)
xxxxxxxxxxxxxxxxxxxx

In order to make all duplicate lines adjacent, pipe the output from cat to sort. Finally, run uniq -u on that output to view just unique lines.

ls -alshows that the file data.txt is in the home directory. To only display unique lines, we can use the command uniq with the option -u. If we look at the man page for uniq, we can see that it filters adjacent matching lines. Because the lines in the file are not all adjacent, we must sort them before passing them to uniq.

Resources

Bandit-level9@overthewire
uniq @linux.die.net

Comments

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