Problem: Do you know how to move between directories and read files in the shell? Start the container, ssh to it, and then ls once connected to begin. Login via ssh as ctf-player with the password, ee388b88
Solution: You use the instance and login.
cat 1of3.flag.txt
cat instructions-to-2of3.txt
cd into the other directories and cat the remaining parts of the flag
Flag: picoCTF{xxsh_0ut_0f_\/\/4t3r_3ca613a1}