Installing packages on myCloud

I really like my new WD myCloud and all that it can do.  But I really don't like the fact that emacs was not included on the base Debian OS.

So, the question is, how to install a new package on Debian.  Here is an example of getting emacs installed on the myCloud.  

First connect with ssh as root.

> apt-get update 

> apt-get install emacs

The first command updates the list of packages the system knows about.  The list is defined by the list of source in the file /etc/apt/sources.list.