November 2007
Beginner
642 pages
15h 43m
English
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7.13. Executing Commands Without Opening a Remote Shell
Problem
You have a single command to run on the remote machine, and you think it would be nice to be able to just run it without logging in and opening a remote shell, running the command, and then logging out. After all, is it not true that laziness is a virtue for network admins?
Solution
And, you shall have what you want because OpenSSH can do this. This example shows how to restart Postfix:
$ ssh mailadmin@limberger.alrac.net sudo /etc/init.d/postfix restartThis shows how to open a quick game of Kpoker, which requires X Windows:
$ ssh -X 192.168.1.10 /usr/games/kpokerYou'll be asked for a password, but you'll still save one whole step.
Discussion
You have to use sudo when you need root privileges with this command, not su, because you can't use su without first opening a remote shell. This is also a handy way to script remote commands.
And yes, laziness is a virtue, if it leads to increased efficiency and streamlined methods of getting jobs done.
See Also
man 1 ssh
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.