Friday, January 2, 2009

Adding Start Up Service With Webmin

We all know that Webmin is like a swiss army knife for Linux SysAds, but again, there are some programs you want to start running as your machine boots or to shut down the program when you invoke a shut down command or a reboot.

I personally use this during power failures when the system wakes up, I want all programs to be up and running.

As an example, ive downloaded and compiled inadyn, a dynamic DNS updater for Linux.

First important thing to know is the directory where the program is located.. When logged in in your shell, go to the directory where the program is located and type pwd (that is print working directory) and it will give you your current location.

In my case the result is: /root/inadyn/bin/linux/

Then you should know if theres a proper shut down command for the program, in inadyns case, theres none. Also, take note of the program name.. In my case the program name is inadyn and I run the program using ./inadyn

Theres a trick here, since if you run it, it will be just on standby.. and when you quit, the program shuts down.. The trick here is to add an & at the end to run it on background..

So to complete it, /root/inadyn/bin/linux/./inadyn&

So we have our command to run..

Go log in to your Webmin website and go to the System tab and select Bootup and Shutdown. Select the Create new bootup and shutdown action ..

After, you could add in your commands and give it a name.. Take note of the name, it should not contain spaces.. Just add a more complete description so you know what runs which when you get back to the list.

Going back to the shut down process, I invoked a killall -9 inadyn so it will force kill the program upon shutting down. This might not be a good idea since killing it on the -9 level is like 'end task' in Windows jargon. It may not properly do last minute saving of data.

An in depht article about killin in -9 is discussed here:

You might want to go easy on the killing. :)

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