Bandit Level 8 → Level 9

https://overthewire.org/wargames/bandit/bandit9.html

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

The command uniq with the option -u will show the content of the file without sequential duplicate lines. In short, we need to sort the file first then use the command uniq.

bandit8@bandit:~$ ls
data.txt
bandit8@bandit:~$ sort data.txt | uniq -u
EN632PlfYiZbn3PhVK3XOGSlNInNE00t