title: Grep for literal strings
body: <p>I'm after a grep-type tool to search for purely literal strings.  I'm looking for the occurrence of a line of a log file, as part of a line in a seperate log file.  The search text can contain all sorts of regex special characters, e.g., <code>[]().*^$-\</code>.</p>
  
  <p>Is there a Unix search utility which would not use regex, but just search for literal occurrences of a string?</p>