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As Linux administrators, we will likely manage a large number of servers, and often 
the server we're managing may not even be in the same physical location as us. 
OpenSSH is a powerful tool for remote management, and it's what we'll explore next.
Getting started with OpenSSH
OpenSSH
 is quite possibly the most useful tool in existence for managing Linux 
servers. Of all the countless utilities available, this is the one I recommend that 
everyone starts practicing as soon as they can. Technically, I could probably better fit 
a section for setting up OpenSSH in 
Chapter 11
, 
Setting Up Network Services
, but this 
utility is very handy, and we should start using it as soon as possible.
OpenSSH allows you to open a command shell on other Linux servers, enabling you 
to run commands as if you were there in front of the server. For Linux administrators 
like us, this is extremely convenient. We could be tasked with managing dozens, 
hundreds, or even thousands of servers. With OpenSSH, we can manage our entire 
server architecture without even getting out of our chair. In this section, I'll give 
you some information on OpenSSH and how to install it, and then I'll finish up the 
section with a few examples of actually using it.