openssh unix dev - Nov 2011 - Strange behaviour of ssh

Hello together!

I've Debian 6.0.3 with OpenSSH_5.5p1 and problem with the execution of
remote commands via ssh.
It seems as if the first command isn't looked up in all "$PATH"
dirs.

Here normally I should get the version information of mpirun twice but the first
one fails:
$ ssh cluster2 mpirun --version ; mpirun --version
bash: mpirun: command not found
mpirun (Open MPI) 1.4.3

Here I should get the place of "mpirun" twice but the first
"which" doesn't find an "mpirun" and prints nothing:
$ ssh cluster2 which mpirun ; which mpirun
/usr/mpi/gcc/openmpi-1.4.3/bin/mpirun

The echo command prints the right "$PATH":
$ ssh cluster2 echo "$PATH"
/usr/mpi/gcc/openmpi-1.4.3/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games

So, does anyone of you have an idea what there could be wrong?
And does anyone know which shell scripts are loaded remotely by ssh?
Is it .bashrc or .profile or/and another one?

Many thanks for any answer!

Regards,
Lukas

Hello Lukas!

On Monday 07 November 2011, Lukas Razik wrote:
> I've Debian 6.0.3 with OpenSSH_5.5p1 and problem with the execution of
> remote commands via ssh.
...
> Here normally I should get the version information of mpirun twice but
> the first one fails: $ ssh cluster2 mpirun --version ; mpirun --version
> bash: mpirun: command not found
> mpirun (Open MPI) 1.4.3
> 
> Here I should get the place of "mpirun" twice but the first
"which"
> doesn't find an "mpirun" and prints nothing: $ ssh cluster2
which mpirun
> ; which mpirun
> /usr/mpi/gcc/openmpi-1.4.3/bin/mpirun
> 
> The echo command prints the right "$PATH":
> $ ssh cluster2 echo "$PATH"
> /usr/mpi/gcc/openmpi-1.4.3/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/ga
> mes:/usr/games
> 
> So, does anyone of you have an idea what there could be wrong?
yes. The ";" is parsed by the _local_ shell, ssh only transmits the
first
part to the remote host - the rest is run locally.

And "$PATH" is expanded locally, too - try with '$PATH'.


To run multiple commands remotely you could try
    ssh cluster2  /bin/sh -c 'mpirun ; mpirun ; which mpirun; echo
$PATH'


Regards,

Phil