How to delay the start of the systemd service

Create a .timer systemd unit file to control the execution of your .service unit file.

By convention, the timer unit starts another unit with the same name,
i.e. foo.timer starts foo.service.


$ cat <<EOF | sudo tee /etc/systemd/system/foo.timer
[Unit]
Description=Timer for the foo service

[Timer]
OnBootSec=1min

[Install]
WantedBy=timers.target
EOF


It is important that the service is disabled (so it doesn't start at boot),
and the timer enabled.

sudo systemctl disable foo.service
sudo systemctl enable foo.timer

sudo systemctl daemon-reload

sudo systemctl list-timers

Ref:
https://sleeplessbeastie.eu/2022/04/04/how-to-delay-the-start-of-the-systemd-service/