title: what is use of `test -x` in Perl script execution
body: <p>I am new to Perl !!!. I have one old crontab entry in sun OS machine to run a Perl script which goes like <code>10 * * * * test -x $path/abc.pl &amp;&amp; $path/abc.pl &gt;/dev/nul</code>.
  I want to know what is the use of term <code>test -x</code> in this execution.</p>