title: Is setsid command missing on OS X?
body: <p>I mean I can't use it in bash, is it not available on OS X, or is it just missing on my Mac?</p>
  
  <p>It's not a PATH variable issue, because I searched with find command, and there's no file named setsid on my Mac at all.</p>
  
  <p>If it's missing on OS X, is there any alternative to it?
  Or if it's the case that I somehow deleted it accidentally, where can I find a copy of it?</p>