====== Create service file for an application ======

We'll use phabricator app as example. It should run after the mysql database was started.
  
Create the file phabricator-phd.service in **/usr/lib/systemd/system/** folder.
  
<file txt phabricator-phd.service>
[Unit]
Description=Phabricator Daemons
After=syslog.target
After=network.target
After=mariadb.service

[Service]
Type=forking
User=apache
Group=apache
ExecStart=/var/www/html/phabricator/phabricator/bin/phd start
ExecStop=/var/www/html/phabricator/phabricator/bin/phd stop
Restart=always
RestartSec=10
StartLimitInterval=0
StartLimitBurst=0
[Install]
WantedBy=multi-user.target
</file>

Enable it at startup:

  systemctl enable phabricator-phd.service

Run it:

  systemctl start phabricator-phd