Apache not starting

 * Starting web server apache2                                                  /usr/sbin/apache2ctl: 87: ulimit: error setting limit (Operation not permitted)
(13)Permission denied: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
Action 'start' failed.
The Apache error log may have more information.