... Apache HTTP Server Version 2.2 . ... How Apache Starts . ... If the Listen specified in the configuration file is default of 80 (or any other port below 1024), then it is necessary to have root privileges in order to start apache, so that it can bind to this privileged port. ... The recommended method of invoking the httpd executable is to use the apachectl control script. ... Trying to start the server when there is another instance of Apache or some other web server already bound to the same Port....