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Asked: 2026-05-22T12:09:10+00:00

I’m calling cmd file that calls ssh to intercommunicate with Linux machine. I use

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I’m calling cmd file that calls ssh to intercommunicate with Linux machine. I use .NET Process class to accomplish this. But when being called within Windows Service call fails with following error:

C:\test>ssh -o StrictHostKeyChecking=no -i private_linux_key user@host "ls" 
      0 [main] ssh 9496 fhandler_base::dup: dup(some disk file) failed, handle 0, Win32 error 6
dup() in/out/err failed

Everything works when I start application as Console application.

What may be possible reason of this failure and how to fix this?

EDIT All Windows service has to do – somehow kill predefined daemon on Linux machine

Thanks

EDIT

Similar problem described there: http://www.velocityreviews.com/forums/t714254-executing-commands-from-windows-service.html

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1 Answer

  1. Editorial Team

    Maybe this post will save someones time to struggle similar problem. I’ve finally found solution that works for me. It is ssh -n key

    So instead of

    ssh -o StrictHostKeyChecking=no -i private_linux_key user@host "ls"

    I’ve used 

    ssh -n -o StrictHostKeyChecking=no -i private_linux_key user@host "ls"

    It still looks like a magic, but it works!

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