ad Apache configuration changes by restarting service using below command sudo systemctl restart apache2 code example
Example 1: ubuntu 14 apache2 graceful restart
# Restart Apache 2 server on Linux/Unix
sudo service apache2 restart
# Start Apache 2 server on Linux/Unix
sudo service apache2 start
# Stop Apache 2 server on Linux/Unix
sudo service apache2 stop
# Reload Apache 2 server on Linux/Unix "No downtime!"
sudo service apache2 reload
Example 2: apache commands on debian
sudo systemctl stop apache2sudo service apache2 stop