Problem: Can you find the flag in file? This would be really obnoxious to look through by hand, see if you can find a faster way. You can also find the file in /problems/grep-1_4_0431431e36a950543a85426d0299343e on the shell server.
File: THE_FILE
Solution: In linux run cat file | grep pico. The cat command reads out the file to the console and the | pipe command is chains the next command. grep searches for the string.
Flag: picoCTF{grep_and_you_will_find_d66382d8}