A friend of mine was doing a CTF that puts you into a chroot jail. He could see the flag.txt, but trying to `cat flag.txt` was saying "cat: flag.txt: No such f

A friend of mine was doing a CTF that puts you into a chroot jail. He could see the flag.txt, but trying to `cat flag.txt` was saying "cat: flag.txt: No such file or directory." He was absolutely stumped. I just said, "what if 'cat: flag.txt [...]' is the flag?" Sure enough. That was actually the flag.