The password for the next level is stored in the file data.txt and is the only line of text that occurs only once
grep, sort, uniq, strings, base64, tr, tar, gzip, bzip2, xxd
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 > whatis grep grep (1) - print lines that match patterns > whatis sort sort (1) - sort lines of text files > whatis uniq uniq (1) - report or omit repeated lines > whatis strings strings (1) - print the sequences of printable characters in files > whatis base64 base64 (1) - base64 encode/decode data and print to standard output > whatis tr tr (1) - translate or delete characters > whatis tar tar (1) - an archiving utility > whatis gzip gzip (1) - compress or expand files > whatis bzip2 bzip2 (1) - a block-sorting file compressor, v1.0.8 > whatis xxd xxd (1) - make a hexdump or do the reverse.
Note: All commands don’t have to be used to complete level
View the contents of the current working directory
1 2 bandit8@bandit:~$ ls data.txt
Peek at the data that is present in the file. This can be achieved using the
1 2 3 4 5 6 7 8 9 10 11 bandit8@bandit:~$ head -n 10 data.txt VkBAEWyIibVkeURZV5mowiGg6i3m7Be0 zdd2ctVveROGeiS2WE3TeLZMeL5jL7iM sYSokIATVvFUKU4sAHTtMarfjlZWWj5i ySvsTwlMgnUF0n86Fgmn2TNjkSOlrV72 NLWvtQvL7EaqBNx2x4eznRlQONULlCYZ LfrBHfAh0pP9bgGAZP4QrVkut3pysAYC U0NYdD3wHZKpfEg9qGQOLJimAJy6qxhS flyKxCbHB8uLTaIB5LXqQNuJj3yj00eh TThRArdF2ZEXMO47TIYkyPPLtvzzLcDf cIPbot7oYveUPNxDMhv1hiri50CqpkTG
(The -n flag allows us to specify how many lines to print from the start of the file. We can use the
tail command to look at the last n lines of a file)
Since we know there are repeating lines in the file. We can use the
uniq command with the
-u flag to print the unique line. Uniq command expects the repeating (similar) lines to be next to each other (adjacent) so we need to sort our data before we can find the unique line.
For sorting we can use the
sort command which will sort the data in the file line-wise. Finally, we can combine all these commands into a one-liner using the
| (pipe) operator
(For more reference on these commands refer to the attached websites)
1 2 bandit8@bandit:~$ cat data.txt | sort | uniq -u UsvVyFSfZZWbi6wgC7dAFyFuR6jQQUhR
cat command is used to read the data from the file which is then passed as input to the next command in the line using pipes
We have found the password for the next level !!
Logout of the current session and use the password of user bandit9 to access the next level
1 2 3 4 > ssh firstname.lastname@example.org -p 2220 This is a OverTheWire game server. More information on http://www.overthewire.org/wargames email@example.com's password: UsvVyFSfZZWbi6wgC7dAFyFuR6jQQUhR