Server Set-Up Issue

I have an Ubuntu 12.10 server and I am trying to install a Garry’s Mod server on it, so I downloaded hldsupdatetool.bin and tried to chmod +x it but nothing happened. Also, when I try to just type in chmod on its own, it says “missing operand”
Do I have to manually install chmod? I tried looking how to do that but nothing comes up.

EDIT: I get the following error when I try to launch the .bin:

-bash: ./hldsupdatetool.bin: No such file or directory

EDIT: Fixed the problem, had to “sudo apt-get install lib32gcc1”