title: Permission denied - /usr/local/bin/pkill.pl
body: <p>I'm installing Homebrew and when I run <code>brew doctor</code> it prompts:</p>
  
  <p><code>Error: Permission denied - /usr/local/bin/pkill.pl</code></p>
  
  <p>I've tried:
  <code>$ sudo chmod 755 /usr/local/bin/pkill.pl</code> (also other options: 777, a-x, ...I don't know which is need it for brew)</p>
  
  <p>but when <code>ls</code>, still:</p>
  
  <p><code>ls: ./pkill.pl: Permission denied
  lrwx------    1 root            wheel        23 11 feb  2012 pkill.pl
  ...</code></p>
  
  <p>Could you tell me how to solve it? Thank you!</p>