Hi!

I want to write a script which will log into all the listed computers, run a list of commands, and then exit, then ssh to next computer and so on.

For this, I need to run the program after sshing and then exit the ssh environment.

How to do that?

The commands for the program is:
1. cd ~/1/
2. nohup /usr/bin/myprogram inputfile

then exit and then

1. cd ~/2/
2. nohup /usr/bin/myprogram inputfile

and so on...

How to do that?

You can use the -C arguement and loop it something like:

for i in 1 2 3 4 5
do
ssh user@IP-Address -C "(cd ~/$i/ ; nohup /usr/bin/myprogram inputfile)"
done

Of course, to do this you'll need to setup ssh keys that allow you to login without a password.

Thanks! I have already setup the ssh keys.

On that note: one of ssh's lesser known features is the ability
to give a user the ability to only run ONE command on login by
adding the command to the authorized_keys file. Of course that
only makes sense for very specialised cases. But if you have a
tool that always needs to be run by an account that was specifically
created for that purpose it's a really tidy solution; you then
only need to do the loop and the ssh command. Or if you have the hosts
the keys are distributed to in a text file, one per line it gets as
simple as:

Cheers,
Tink