Problem: This one is a little bit harder. Can you find the flag in /problems/grep-2_3_826f886f547acb8a9c3fccb030e8168d/files on the shell server? Remember, grep is your friend.
Solution:
Using your login go to https://2018game.picoctf.com/shell
change directories into the problem: cd /problems/grep-2_3_826f886f547acb8a9c3fccb030e8168d/files
By using ls you can see that there’s a crap ton of directories.
files0 files1 files2 files3 files4 files5 files6 files7 files8 files9
To look at each file, you would take forever.
Use cat and the */* to read out all the files and then pipe | and grep grep pico.
Code:
cat */* | grep pico
Flag: picoCTF{grep_r_and_you_will_find_556620f7}