Edit /etc/rc.local
sudo chmod +x /etc/rc.local
Update /lib/systemd/system/rc-local.service
[Service]
Type=forking
ExecStart=/etc/rc.local start
TimeoutSec=0
RemainAfterExit=yes
GuessMainPID=no
[Install]
WantedBy=multi-user.target
Enable service
sudo systemctl start rc-local
sudo systemctl status rc-local