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

• Java App Example

[Unit]
Description=Email service
Requires=network.target remote-fs.target
After=network.target remote-fs.target

[Service]
Type=simple

PIDFile=/path_to_PID/java-app.pid
User=ubuntu
Group=ubuntu
WorkingDirectory=/opt/apps/
ExecStart=/usr/bin/java -jar /opt/apps/email-1.0.0.jar

StandardOutput=append:/var/log/app.log
StandardError=append:/var/log/app-error.log

Restart=on-failure
RestartSec=10

[Install]
WantedBy=multi-user.target

Enable To Run On Boot:

sudo systemctl enable somename.service

If you changed systemd config you need to reload it.

sudo systemctl daemon-reload

Start, Stop, Status:

sudo systemctl start somename.service

sudo systemctl stop somename.service

sudo systemctl restart somename.service

sudo systemctl status custom.service