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Full Discussion: Cannot create variables via ssh on remote machine
Top Forums Shell Programming and Scripting Cannot create variables via ssh on remote machine Post 302571811 by black_fender on Tuesday 8th of November 2011 09:58:16 AM
Old 11-08-2011
Cannot create variables via ssh on remote machine
Hello to all

Background info:
Local machine : Linux, /bin/bash
Remote machine (for the user used for ssh) : SunOs, /bin/ksh
(so we have different OS, different Shells)

My problem :
From the local host i execute
Code:
$   var=bla
$   result=$(ssh -q user@remote-machine "
> echo \"this is var: $var \"
> var2=ggg
> echo \"this is var2 : $var2 \"
> "
> ) 
$   echo "$result"                   
this is var: bla 
this is var2 :

So, as you can see I want to open a ssh session on a remote machine and a want to shift a variable there also (in my case variable $var ). From what I know I can only do that by using the syntax : ssh user@machine " command " , so I used double quotes to describe the commands which I wanna execute via ssh. So, from my example you can see that I can shift the $var variable on the remote session, but I cannot create and/or call (?) another variable $var2 .
If I use ' ' (simple quotes) instead of " " . I can create the variable $var2 , but I cannot shift the variable $var :| .

I tried the same thing when the remote machine was Linux with /bin/sh shell for the user used for ssh. The results are the same, so I don't think it is an issue of different OS or different shells

Any ideas?

P.S. : i dont want to use workarounds such as declare $var in a file, scp the file on the remote host and source it there.

P.P.S. I cannot use rsh, remotexec.
Last edited by vbe; 11-14-2011 at 05:12 AM..
 

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LEARN ABOUT DEBIAN

gnome-ssh-askpass

GNOME-SSH-ASKPASS(1)					      General Commands Manual					      GNOME-SSH-ASKPASS(1)

NAME

       gnome-ssh-askpass - prompts a user for a passphrase using GNOME

SYNOPSIS

       gnome-ssh-askpass

DESCRIPTION

       gnome-ssh-askpass  is  a GNOME-based passphrase dialog for use with OpenSSH.  It is intended to be called by the ssh-add(1) program and not
       invoked directly.  It allows ssh-add(1) to obtain a passphrase from a user, even if not connected to a terminal (assuming that an X display
       is  available).	This happens automatically in the case where ssh-add is invoked from one's ~/.xsession or as one of the GNOME startup pro-
       grams, for example.

       In order to be called automatically by ssh-add, gnome-ssh-askpass should be installed as /usr/bin/ssh-askpass.

ENVIRONMENT VARIABLES

       The following environment variables are recognized:

       GNOME_SSH_ASKPASS_GRAB_SERVER
	      Causes gnome-ssh-askpass to grab the X server before asking for a passphrase.

       GNOME_SSH_ASKPASS_GRAB_POINTER
	      Causes gnome-ssh-askpass to grab the mouse pointer using gdk_pointer_grab() before asking for a passphrase.

       Regardless of whether either of these environment variables is set, gnome-ssh-askpass will grab the keyboard using gdk_keyboard_grab().

AUTHOR

       This manual page was written by Colin Watson <cjwatson@debian.org> for the Debian system (but may be used by others).  It was based on that
       for x11-ssh-askpass by Philip Hands.

															      GNOME-SSH-ASKPASS(1)
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