http://www.perlmonks.org?node_id=579001


in reply to Re^2: Why can't a run a system command?
in thread Why can't a run a system command?

You really should put the full path to any system commands that are run from a CGI. You cannot guarantee that $ENV{PATH} in the CGI environment will be the same as it is during your login session.

Furthermore, it's a FAQ too, and a suitable Super Search reveals quite a lot of potentially interesting hits.