title: How to use sed to replace string that contains slash?
body: <p>I wanto replace <code># SigningTable  refile:/etc/opendkim/SigningTable</code> to <code>SigningTable  refile:/etc/opendkim/SigningTable</code>. 
  Which means just remove <code>#</code>.<br>
  I use <code>sed -i 's/# SigningTable  refile:/etc/opendkim/SigningTable/ SigningTable  refile:/etc/opendkim/SigningTable/g' /etc/opendkim.conf</code>,but doesn't work.<br>
  I think it's because <code>/</code>,how to use sed to replace string with <code>/</code>? </p>