Question

41

How to use sshpass?

rated 0 times [ 41] [ 0] / answers: 1 / hits: 274286 / 3 Years ago, wed, may 26, 2021, 10:39:48

I need to use sshpass to launch a remote command through SSH from a Java code.

If I manually type in a console:

ssh -p 22 user@ipaddress mplayer '/media/data/myFavouriteSong.mp3'

works perfectly, but asks for password. So I tried running sshpass:

sshpass -p mypass ssh -p 22 user@ipaddress mplayer '/media/data/myFavouriteSong.mp3'

sshpass -p mypass ssh -l user@ipaddress mplayer '/media/data/myFavouriteSong.mp3'

sshpass -p mypass ssh -t user@ipaddress mplayer '/media/data/myFavouriteSong.mp3'

sshpass -p mypass ssh user@ipaddress echo 'OK'

and none of them work.

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ongdiligenc

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answered 3 Years ago freezidepu · Accepted Answer

This may be caused by the host-key checks done by ssh. It looks like sshpass keeps silent on invalid host keys (no output on neither stderr nor stdout) and exists with status-code 6. At the time of this writing, this was revision 50, and the matching constant in the code is RETURN_HOST_KEY_UNKNOWN, which hints to that error.

Your error-code may differ and looking at the code linked above may give you some insight.

If your issue is an invalid host-key you should think twice about overriding the error with a CLI option. Your machine could be compromised or you may be subject to a MITM attack! If you are 100% certain that this is not the case and if you have no means to keep the verified host-keys up-to date, you can use a command like this:

sshpass -pfoobar ssh -o StrictHostKeyChecking=no user@host command_to_run