How to setup systemd timers for your MyBB task system.

mybb-systemd.md

Create the following two files in your /etc/systemd/system/ directory:

mybb.service:

[Unit]
Description=MyBB Tasks

[Service]
User=www-data
ExecStart=/usr/bin/php /var/www/mybb/task.php

mybb.timer

[Unit]
Description=Runs MyBB tasks every minute

[Timer]
OnBootSec=5min
OnUnitActiveSec=1min
Unit=mybb.service

[Install]
WantedBy=multi-user.target

Now, run the following commands in order:

systemctl daemon-reload
systemctl enable mybb.timer
systemctl start mybb.timer