Perl-IPC-Cmd 0.25 - Finding and running system commands made easy.

IPC::Cmd allows you to run commands, interactively if desired, platform independent but have them still work.

The can_run function can tell you if a certain binary is installed and if so where, whereas the run function can actually execute any of the commands you give it and give you a clear return value, as well as adhere to your verbosity settings.