title: Interpret as fixed string/literal and not regex using sed
body: <p>For <code>grep</code> there's a fixed string option, <code>-F</code> (<code>fgrep</code>) to turn off regex interpretation of the search string.
  Is there a similar facility for <code>sed</code>?  I couldn't find anything in the man. A recommendation of another gnu/linux tool would also be fine.</p>
  
  <p>I'm using <code>sed</code> for the find and replace functionality: <code>sed -i "s/abc/def/g"</code></p>