title: apache user does not exist
body: <p>I'm trying to run the command, chown -R apache:apache xyz
  But I'm getting error, chown: <code>apache:apache': invalid user</code></p>
  
  <p>Then I tried for the user www-data, but with same results.</p>
  
  <p>Then I tried to check who owns the apache process by running, <code>ps -Af |grep httpd</code>.
  I get the following,</p>
  
  <pre><code>root     29577     1  0 18:00 ?        00:00:00 /opt/lampp/bin/httpd -k start -DSSL -DPHP5
  nobody   29754 29577  0 18:00 ?        00:00:00 /opt/lampp/bin/httpd -k start -DSSL -DPHP5
  nobody   29756 29577  0 18:00 ?        00:00:00 /opt/lampp/bin/httpd -k start -DSSL -DPHP5
  nobody   29757 29577  0 18:00 ?        00:00:00 /opt/lampp/bin/httpd -k start -DSSL -DPHP5
  nobody   29758 29577  0 18:00 ?        00:00:00 /opt/lampp/bin/httpd -k start -DSSL -DPHP5
  nobody   29759 29577  0 18:00 ?        00:00:00 /opt/lampp/bin/httpd -k start -DSSL -DPHP5
  nobody   29760 29577  0 18:00 ?        00:00:00 /opt/lampp/bin/httpd -k start -DSSL -DPHP5
  root     29785 29358  0 18:04 pts/0    00:00:00 grep httpd
  </code></pre>
  
  <p>So, where is the apache user?</p>
  
  <p>Thanks.</p>