Back to OverTheWire again!
You finished the first ten levels, time to go back for 10-15! Pay attention to the "Commands you might need to solve this level", but remember, you won't need all of them!
https://overthewire.org/wargames/bandit/bandit11.html
SSH into : ssh bandit.labs.overthewire.org -p 2220 -l bandit10
With the password: G7w8LIi6J3kTb8A7j9LgrywtEUlyyp6s
If you ever get stuck on anything for more than a half hour, message us in #techsupport and we will help you out! Don't worry, I have no problems giving you very specific instructions to get to the next stage. If your googling keeps popping up Bandit walkthroughs instead of references, use the search operator -"bandit" to clean up the search results.
As a hint, 12-13 is a miserable problem and requires guessing. I'll save
you from some guesswork. Did you know xxd -r exists? Don't say I never
did anything for you.
Good luck!!!!