how to reload apache server 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: restart apache

sudo systemctl restart apache2
# or
sudo service apache2 restart