topic Batch SSH from linux to Windows in Operating System - Linux

Batch SSH from linux to Windows

Shailesh P Joshi — Fri, 21 Apr 2006 17:39:34 GMT

Hello,

We have few Apache web-servers running on 3-4 Windows machines. We are planning to monitor those machines from a linux box. We check whether the web-site is up/down by using "wget" and then if the site is down, send mail alerts.

In addition to sending alerts, we would like to restart the web server if the site is down. We thought, the best way would be to set up freeSSHd server on Windows box and connect to windows from Linux using public-private keys and then execute some batch script located on Windows.

We have successfully set up the keys, so that we can connect to windows without specifying the password. But when I try to execute following command for testing -

ssh -l <ls -lart
EOF

its giving error -
"Pseudo-terminal will not be allocated because stdin is not a terminal."

I tried changing 'command line shell' in freeSSHd to cygwin.bat. But the problem still exists.

I tried to search on net, but did not find any post related to this.

Is this possible? Or we are trying to achieve something impossible?

Thanks for the help.

Regards,
Shailesh

Re: Batch SSH from linux to Windows

Ivan Ferreira — Fri, 21 Apr 2006 19:00:42 GMT

I wonder if the command is executed, try with a batch command, like this:

ssh -l <ls -latr > ls.log 2>&1 &
EOF

Verify if the ls.log file is executed. Now, if you are success, how do you plan to stop the service? The net stop command won't be in cygwin I think. Windows 2003 have service recovery configuration.

Maybe, you can also enable telnet services on windows and use expect scripts to logon to the server and restart the service.

Re: Batch SSH from linux to Windows

Stuart Browne — Fri, 21 Apr 2006 19:07:44 GMT

Ivan, under Cygwin, you still have access to the standard dos/windows commands.

As for the other, why don't you use the form:

ssh -l "ls -lart"

You can stack the commands as well:

ssh -l "cd /;ls -lart;/cygdrive/c/Windows/system32/net.exe ..."

Re: Batch SSH from linux to Windows

Bill Thorsteinson — Mon, 24 Apr 2006 09:03:37 GMT

Try adding the -T option to your ssh command.
This will disable pseudo-terminal allocation
which you shouldn't need for your script.

Re: Batch SSH from linux to Windows

Sergejs Svitnevs — Mon, 24 Apr 2006 09:55:22 GMT

Try to add "-f -t" options:
# ssh -f -t -l <
This should fork ssh into background and force pseudo-tty allocation just before command execution.

Regards

Re: Batch SSH from linux to Windows

Alan_152 — Mon, 24 Apr 2006 09:57:56 GMT

I personally use expect in situations like this...

Re: Batch SSH from linux to Windows

Andrea Rossi — Thu, 27 Apr 2006 02:04:57 GMT

I use cygwin.