Here are some short commands for linux OS you can use to execute start/stop and restart apache services. Commands must be executed from linux terminal/ssh in other words they all are ssh commands.
To Start Apache2 web server:
# /etc/init.d/apache2 start
OR
# /etc/init.d/httpd start
OR
# service apache2 start
OR
# service httpd start
To Stop Apache2 web server:
# /etc/init.d/apache2 stop
OR
# /etc/init.d/httpd stop
OR
# service apache2 stop
OR
# service httpd stop
To Restart Apache2 web server:
# /etc/init.d/apache2 restart
OR
# /etc/init.d/httpd restart
OR
# service apache2 restart
OR
# service httpd restart
The above commands can be executed on any linux OS.