running a script at shutdown

[James Gray]

On 16/06/2008, at 6:08 AM, Dirk Tamme wrote:

> Hi,
> I have a small script (looking for some file properties etc.). I  
> checked that it works, and now I want to run it automatically at  
> every shutdown. I think this should be possible -- but how to manage  
> this?
>
> Thanks for any help,
> Dirk T.

Drop it into /etc/rc0.d with a name like "SnnMyScript" where "nn" is a  
number.  This will cause it to run as the nn'th item when entering run  
level 0 (ie, shutdown).

However, the "proper" way would be to drop the script into /etc/init.d/ 
MyScript then use "sudo update-rc.d" to insert your script at the  
correct places:
sudo update-rc.d MyScript start nn 0

Again, where "nn" is the order you want to run your script at.  If you  
want it to run on BOTH shutdown and reboot (run levels 0 and 6  
respectively) append "6" to the upate-rc.d line above.  Be careful  
about where you run your script (the "nn") as it may rely on services  
that get stopped during shutdown/reboot.  Conversely, your script's  
changes may be over-written by a process after your script has run.   
Without knowing more about your script, all I can say is make sure you  
know what it relies on and get the "nn" right :)

HTH,

James