To run a system utility from perl, system, open, or exec. Use the LIST forms of argument to avoid shell interpolation.

There. I've given you enough rope to shoot yourself in the foot and blow your leg clean off. It is dangerous to give web users a form to run arbitrary commands on your server. Be very very careful, use Safe, and learn something about the evil tricks one can pull before exposing yourself.

After Compline,
Zaxo