Executing command remotely with ssh, and PATH

Karl Auer kauer at biplane.com.au
Thu Aug 9 13:59:04 UTC 2012


On Thu, 2012-08-09 at 14:42 +0100, Colin Law wrote:
> ssh remote_server "PATH=/some/path:$PATH; echo $PATH"
> Can anyone put me straight?

The variable is being expanded in the command, before the command is
being sent to the remote server. You need to escape any dollar signs
that are needed at the other end,

Here is a sequence showing the effect

   kauer at karl:~$ unset FRED
   kauer at karl:~$ echo $FRED

   kauer at karl:~$ ssh localhost "FRED=blah ; echo $FRED"

   kauer at karl:~$ ssh localhost "FRED=blah ; echo \$FRED"
   blah

Regards, K.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Karl Auer (kauer at biplane.com.au)
http://www.biplane.com.au/kauer
http://www.biplane.com.au/blog

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