which is a powerful command used in SSH environment to find out path of perl script, php executables, sendmail and many other linux utilities.
Try the following in SSH:
which php
>>> Results: /usr/local/bin/php
(Results will reflect according to your server settings)
which perl
>>> Results: /usr/local/bin/perl
(Results will reflect according to your server settings)
You can try this command for sendmail and other script locations.
