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Write a Daemon

It's super easy to write your own daemon, so here's how.

The Daemon File​

Choose a name for your app / service. This example will use my-app.

Create a new file (with sudo) at: /etc/systemd/system/<app-name>.service, like /etc/systemd/system/my-app.service

There are plenty of options for the file, but here's an example one that requires the network and users to be up after a reboot, and then starts a python script. To actually use this script, make sure to replace <username> with the actual username you want to use and replace any paths as necessary.

[Unit]
Description=My App
After=network.target

[Service]
ExecStart=/usr/bin/python3 /home/<username>/my-script.py
Restart=always
User=<username>
WorkingDirectory=/home/<username>

[Install]
WantedBy=multi-user.target

Install the Daemon​

Load the new service:

sudo systemctl daemon-reload

Enable the service:

sudo systemctl enable my-app

Start the service for the first time, if you don't want to reboot right now:

sudo systemctl start my-app