There are many ways to restart Apache service and this depends on your platform of choice and personal preferences
| Command | Method and Applicable Platform |
|---|---|
# systemctl restart httpd.service | Systemd. Ubuntu 16.10 and later, RedHat/CentOS 7 and later, Fedora and other platform with systemd |
# service httpd restart | Platforms with service command. Normally a wrapper to System V init scripts or systemd commands. |
# /etc/init.d/apache2 restart | Older platforms with System V init scripts |
# httpd -k restart | Apache's built-in command |
Different platform might use different binary/script names such as apache, apache2, apachectl or apache2ctl