title: PERL regex matching lines containing certain directory path
body: <p>What is the best way to use regular expression in Perl for filtering all lines containing, for instance <code>/usr/libexec/postfix</code>?</p>
  
  <p>That would also catch, e.g.: <code>/usr/libexec/postfix/qmgr</code>, <code>/usr/libexec/postfix/smtp</code>, <code>/usr/libexec/postfix/local</code> and so forth?</p>