I would like my service application to restart itself once per 24 hours, but only when nothing else is going on. So the application itself would know this but how can I make it restart itself (as the service)?

It is running in a RaspberryPi so it is a Debian derivative Linux.

Bo Berglund wrote

I would like my service application to restart itself once per 24 hours, but only when nothing else is going on. So the application itself would know this but how can I make it restart itself (as the service)?

Just exit ?
If you configured systemd to start your app correctly it will restart it.

Michael.

Is it as simple as that? Here is my service file:

[Unit]
Description=SSRemote Server
Wants=network.target
After=syslog.target network-online.target

[Service]
Type=simple
ExecStart=/agi/ssremote/bin/SSRemoteServerLx
Restart=always #<== This
RestartSec=10 #<== And this
KillMode=process
User=pi

[Install]
WantedBy=multi-user.target

Do these 2 marked lines mean that if the service application just exits (with no exit code) systemd will restart it after 10 seconds?

And:
Right now I am running it as user pi as shown above, is there some reason I should run it as root instead?
(I wanted the files created while running to be owned by pi).

Yes.

And: Right now I am running it as user pi as shown above, is there some reason I should run it as root instead?

Running as root is not recommended. You can do it, but I would not.

Michael.

Thanks Michael, much obliged!
Makes things so much simpler. Just exit at the appropriate time. :-)

If you didn't have the configuration setup as required, you could still spawn a second process to kill and restart your process as well, this works too, but Michael's suggestion is probably much cleaner, and in all likelihood, is probably the preferred method, but I know folks struggle with the whole system process configuration issue, so some go the other route just for simplicity sake.