Remote SSH commands

Hello,

Tipically If you run a remote command using SSH the behavior is the
following:

#ssh user@remote_machine ls

It runs ls and it sends you the output back, so in your machine you see
the output of the ls command.

What about if instead of ls I want to execute a daemon and leave the
daemon running in the remote machine. Then the command line would be
blocked until the remote daemon terminates in order to drop the output
in my terminal. But then I have a problem, imagine I want to write an
script that runs this daemon in two dirfferent machines, I mean sth
like:

#!/bin/bash

ssh user@machine_1 daemon
ssh user@machine_2 daemon

The problem with this is that after the first ssh the execution stops
until daemon terminates in machine_1. But this is not what I want, I
want this script to execute daemon in machine_1 then in machine_2 and
exits leaving the daemons running in both machines.

I have tried running the daemons in background (&) but it does nor
work, ssh waits for the output anyway.

Best Regards

Dani

On 22 Oct 2005 08:34:17 -0700, Dani Camps wrote:
>
> I have tried running the daemons in background (&) but it does nor
> work, ssh waits for the output anyway.

what happens if you nohup whatever &

> I have tried running the daemons in background (&) but it does nor
> work, ssh waits for the output anyway.

Did you try redirecting stdin from /dev/null? This is SOP for rhs, so
it's worth a try.

On Sat, 22 Oct 2005 08:34:17 -0700, Dani Camps wrote:

> Hello,
>
> Tipically If you run a remote command using SSH the behavior is the
> following:
>
> #ssh user@remote_machine ls
>
> It runs ls and it sends you the output back, so in your machine you see
> the output of the ls command.
>
> What about if instead of ls I want to execute a daemon and leave the
> daemon running in the remote machine. Then the command line would be
> blocked until the remote daemon terminates in order to drop the output
> in my terminal. But then I have a problem, imagine I want to write an
> script that runs this daemon in two dirfferent machines, I mean sth
> like:
>
> #!/bin/bash
>
> ssh user@machine_1 daemon
> ssh user@machine_2 daemon
>
> The problem with this is that after the first ssh the execution stops
> until daemon terminates in machine_1. But this is not what I want, I
> want this script to execute daemon in machine_1 then in machine_2 and
> exits leaving the daemons running in both machines.
>
> I have tried running the daemons in background (&) but it does nor
> work, ssh waits for the output anyway.
>
> Best Regards
>
> Dani

From ssh man page:

-f Requests ssh to go to background just before command execution.
This is useful if ssh is going to ask for passwords or
passphrases, but the user wants it in the background. This
implies -n. The recommended way to start X11 programs at a
remote site is with something like ssh -f host xterm.

Is that what you want?