Have you ever gotten this error message when trying to (re)start Apache
httpd not running, trying to start
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
If you are running with an SSL certificate on your box, Apache cannot start up without the correct passphrase. I’ve run into this [...]
Fun with Apache2 – httpd not running, trying to start (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down