Written by Michael Zhang
Alright time to get to some fun stuff: binaries. A binary is just a really fancy word that means a file (or in this case, a program) that contains some bits that are not text.
The binary in this problem is a program. When you run it, it'll ask you for an input, but not just any input: a special character. To run this binary, navigate to the folder /problems/pipe and run ./pipe.
The source code is available for download here, or you can find it at /problems/pipe/pipe.c on the shell server. The flag has been redacted.
A pipe can refer to a number of things, but the one you are probably most concerned about is this | symbol.
$ echo -e "\\x7" | ./pipe
Please enter the character \x07 to get the flag!
Wow! Your flag is: thats_so_nice
thats_so_nice