Written by Michael Zhang
Ok, so now you know how to list files and read files... this is starting to sound more like a file manager you are familiar with, right? So what's left now? Searching.
Luckily, there's also a command for that: grep. You know the drill, read up on the command, and then solve the problem in /problems/grep.
The flag is the filename of the file containing the string yep!. All other files will contain the string nope!.
What character stands for "all files"?
login as: user37142
[email protected]'s password:
user37142@easyctf:~$ cd /problems/grep
user37142@easyctf:/problems/grep$ grep "yep!" *
27054997:yep!
27054997