March 21, 2024

Execute a Script at Server Startup

As far as I know, it's impossible to use a Cron job to do this on illumos; you need to use /etc/rc.d.

Here's how I do it :

• Log in as root

• Write your script and copy it to /etc/init.d/

Make sure root has permissions to execute it!
Otherwise, it will not work.
Let's assume your script is called SCRIPT.SH :

chmod 740 /etc/init.d/SCRIPT.SH

• Create a symbolic link to the rc3.d directory (this is where network configurations are made, among other things)

ln -s /etc/init.d/SCRIPT.SH /etc/rc3.d/S80-SCRIPT.SH

The prefix S80 is crucial because it indicates the order in which the scripts will be executed.
You must put the letter [S] followed by a number between 01 and 99, depending on the order in which you want the scripts to be executed.

Restart the server, and your SCRIPT.SH has been executed.