Create Custom Service (Daemon) | Systemd

Create file:

sudo nano /etc/systemd/system/somename.service

[Unit]
Description=MyApp

[Service]
ExecStart=/usr/bin/somecommand start
ExecStop=/usr/bin/somecommand stop
Restart=always
User=nobody
# Note Debian/Ubuntu uses 'nogroup', RHEL/Fedora uses 'nobody'
Group=nogroup

WorkingDirectory=/home/ubuntu/SomeDir

[Install]
WantedBy=multi-user.target

Enable To Run On Boot:

sudo systemctl enable somename.service

Start, Stop, Status:

sudo systemctl start somename.service