Hi!I think, you could write a script for this. Using perhaps ping, to just see, if the server responds or wget to download a certain file. I'm not sure though about their timeouts. I think you can set a tieout with wget. Then you could use mail to send an e-mail. I suppose, tat there might be a more comfotable way with more GUI stuff, but that would do the trick.
I've seen:
ping -W timeout_in_secs server
This will only timeout after timeout_secs, if no response is received.
The line to send mail would be:
cat file | nail -s "subject" -r "from@host" to@host
That should do.
Warmly yours
Julien
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