[K12OSN] OT: Shutdown Linux from Windows?

[Onatawahtaw]

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 at 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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