Bandit Level 9

Goal

The password is in data.txt and is the only line of text that occurs only once.

Key concept

To use uniq, identical lines must be adjacent — so you almost always pair it with sort.

Steps

1. SSH in:

ssh bandit9@bandit.labs.overthewire.org -p 2220

2. Find the unique line:

sort data.txt | uniq -u

That output is the password for Level 10.

Notes

• uniq -u prints only lines that are not repeated.
• If you want counts for intuition:

sort data.txt | uniq -c | sort -n | tail