You can restart by going to Apache instance location >> bin folder and execute apachectl script.
./apachectl stop
./apachectl start
You may also use script located in /etc/init.d/. Mostly it will be named either “apache” or “httpd”
/etc/init.d/apache stop
/etc/init.d/apache start
Another procedure would be using services
httpd stop
service httpd start
