You can then create the service file /etc/systemd/system/rnsd.service with the following content:

[Unit]

Description=Reticulum Network Stack Daemon

After=multi-user.target

[Service]

# If you run Reticulum on WiFi devices,

# or other devices that need some extra

# time to initialise, you might want to

# add a short delay before Reticulum is

# started by systemd:

# ExecStartPre=/bin/sleep 10

Type=simple

Restart=always

RestartSec=3

User=USERNAMEHERE

ExecStart=rnsd --service

[Install]

WantedBy=multi-user.target

Be sure to replace USERNAMEHERE with the user you want to run rnsd as.

To manually start rnsd run:

sudo systemctl start rnsd

If you want to automatically start rnsd at boot, run:

sudo systemctl enable rnsd

Alternatively you can use a user systemd service instead of a system wide one. This way the whole setup can be done as a regular user. Create a user systemd service files ~/.config/systemd/user/rnsd.service with the following content:

[Unit]

Description=Reticulum Network Stack Daemon

After=default.target

[Service]

# If you run Reticulum on WiFi devices,

# or other devices that need some extra

# time to initialise, you might want to

# add a short delay before Reticulum is

# started by systemd:

# ExecStartPre=/bin/sleep 10

Type=simple

Restart=always

RestartSec=3

ExecStart=RNS_BIN_DIR/rnsd --service

[Install]

WantedBy=default.target

Replace RNS_BIN_DIR with the path to your Reticulum binary directory (eg. /home/USERNAMEHERE/rns/bin).

Start user service:

systemctl --user daemon-reload

systemctl --user start rnsd.service

If you want to automatically start rnsd without having to log in as the USERNAMEHERE, do:

sudo loginctl enable-linger USERNAMEHERE

systemctl --user enable rnsd.service