check restart apache code example
Example 1: restart apache
sudo systemctl restart apache2
# or
sudo service apache2 restart
Example 2: apache 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