OverTheWire - Bandit - Level 11 to Level 12

Description:

Level Goal

The password for the next level is stored in the file data.txt, where all lowercase (a-z) and uppercase (A-Z) letters have been rotated by 13 positions

Commands you may need to solve this level

grep, sort, uniq, strings, base64, tr, tar, gzip, bzip2, xxd

Helpful Reading Material

Rot13 on Wikipedia

Solution:

1. [Comment] Using SSH to connect the server
2. sp@simple-plan:~|=> ssh bandit11@bandit.labs.overthewire.org
   ...
   bandit11@bandit.labs.overthewire.org's password: IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR
3. [Comment] Using ls command to list directory contents
4. bandit11@melinda:~$ ls
   data.txt
5. [Comment] Using cat command to output file's contents
6. bandit11@melinda:~$ cat data.txt
   Gur cnffjbeq vf 5Gr8L4qetPEsPk8htqjhRK8XSP6x2RHh
7. [Comment] Utilizing the tr command to achieve ROT13
8. [Comment] Using alias to create shortcuts for commands
9. bandit11@melinda:~$ alias rot13="tr a-zA-Z n-za-mN-ZA-M"
10. [Comment] Since there are 26 characters in the alphabet being used, ROT13 twice would restore the original text
11. bandit11@melinda:~$ cat data.txt | rot13
    The password is 5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu
12. [Comment] Using exit command to disconnect connection to server
13. bandit11@melinda:~$ exit
    logout
    Connection to bandit.labs.overthewire.org closed.
14. [Comment] It's done! Saving the password for next level.

Reference:

ssh	http://linuxcommand.org/man_pages/ssh1.html
ls	http://linuxcommand.org/man_pages/ls1.html
cat	http://linuxcommand.org/man_pages/cat1.html
exit	http://linuxcommand.org/man_pages/exit1.html
cd	http://linuxcommand.org/lc3_man_pages/cdh.html
find	http://linuxcommand.org/man_pages/find1.html
grep	http://linuxcommand.org/lc3_man_pages/grep1.html
sort	http://linuxcommand.org/lc3_man_pages/sort1.html
uniq	http://linuxcommand.org/man_pages/uniq1.html
strings	http://linuxcommand.org/man_pages/strings1.html
base64	http://linux.die.net/man/1/base64
tr	http://linuxcommand.org/man_pages/tr1.html
alias	http://linuxcommand.org/man_pages/alias1.html