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Re: [K12OSN] OT: Shutdown Linux from Windows?



You didn't specify that it may be one of several winders boxen as the 
"controller" but that's ok. . .  It was fun working that out anyway.

Doug Simpson
Technology Specialist
DeQueen Public Schools
DeQueen, AR 71832
simpsond leopards k12 ar us
Tux for President!

On Tue, 5 Sep 2006, Onatawahtaw wrote:

> Thanks Doug and others!
> 
> While this is a very unique idea (one that I will
> definately keep for future reference) it also requires
> that I have a dedicated windows computer that needs to
> be on all the time. I do not have a dedicated windows
> computer. Though, even if I did if it were to ever
> crash (ok not very likely with a MS system) ;) that
> would mean all the students would lose what they are
> working on as theirs will shut down.
> 
> Perhaps sending a shutdown command through ssh would
> be ideal. Though I'd have to figure out how to script
> it.
> 
> Cool idea though Doug. I like it!
> 
> God bless,
> 
> -Kevin
> 
> --- Doug Simpson <veewee77 alltel net> wrote:
> 
> > Here is a possibility. . .
> > 
> > Ping the winders box (the one from which you want to
> > shut down the linux 
> > server) and outputs to a file.
> > 
> > example:
> > [server]$ ping -i 5 servername >> /pingreturns
> > This pings the server every 5 seconds. Change the
> > number to whatever 
> > resolution you want.
> > Run this fron a cron job at a time a bit after you
> > expect the winders 
> > computer to be online, say half an hour after. (or
> > you could put it in 
> > the rc.local so it will run when the server is
> > started, just make sure 
> > the winders one is up enough to reply to ping
> > requests or the linux will 
> > go back down again.)
> > Run a second cron job that runs every minute (or
> > whatever resolution you 
> > prefer) that
> > greps this outut file for a string stating that the
> > pinged hosts is 
> > unreachable:
> > 
> > grep reply /pingreturns and if it finds "reply from"
> > then exit.
> > 
> > If it finds "unreachable" branch and delete the
> > /pingreturns file
> > and then run "shutdown -h now".
> > 
> > The grep line is the one I will need help with the
> > syntax and it may 
> > actually have to be done in a script that would run
> > in the cron job.
> > 
> > What this will do is ping the winders computer. If
> > it returns, all is 
> > well. If it is unreachable, delete the /pingreturn
> > file (so it won't try 
> > to use it tomorrow and find "unreachable" in there
> > and shut right back 
> > down again) and then shutdown the linux computer
> > with:
> > shutdown -h now
> > in the script.
> > 
> > Assuming this is a daily thing, you will only need
> > to shutdown the 
> > winders one and the linux will soon follow it based
> > on your resolution 
> > as mentioned above.
> > 
> > I will try to play with the grep thing later and see
> > if I can come up 
> > with a workable solution for you.
> > 
> > Hope this is what you were looking for.
> > 
> > Doug
> > 
> > 
> > 
> > 
> > 
> > Onatawahtaw wrote:
> > 
> > >Greetings,
> > >
> > >Currently I can shut down all my windows computers
> > >using psshutdown.exe (and a batch program). Is
> > there
> > >any way I can shut down linux computers from within
> > >windows? 
> > >
> > >If not, how can I shutdown remote linux computers
> > from
> > >within linux? All the linux computers use the same
> > >root password so I would like to just put them in a
> > >shell script.
> > >
> > >Thanks,
> > >
> > >-Kevin
> > >
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