soal

The password for level 2 is in the file ‘krypton2’. It is ‘encrypted’ using a simple rotation.
It is also in non-standard ciphertext format. When using alpha characters for cipher text it is normal to group the letters into 5 letter clusters, regardless of word boundaries. This helps obfuscate any patterns.
This file has kept the plain text word boundaries and carried them to the cipher text. Enjoy!

solve

ssh krypton1@krypton.labs.overthewire.org -p 2231 
#                       _                     _              
#                      | | ___ __ _   _ _ __ | |_ ___  _ __  
#                      | |/ / '__| | | | '_ \| __/ _ \| '_ \ 
#                      |   <| |  | |_| | |_) | || (_) | | | |
#                      |_|\_\_|   \__, | .__/ \__\___/|_| |_|
#                                 |___/|_|                   

#                       This is an OverTheWire game server. 
#             More information on http://www.overthewire.org/wargames

# krypton1@krypton.labs.overthewire.org's password:

cd /krypton/krypton1
cat krypton2 
# YRIRY GJB CNFFJBEQ EBGGRA

echo "YRIRY GJB CNFFJBEQ EBGGRA" | tr '[N-ZA-M]' '[A-Z]'                   
# LEVEL TWO PASSWORD ROTTEN

ROT 13

• caesar chiper shift 13 / ROT 13

flag

ROTTEN