What to read on remote administration of VPS?

Question

Network administration

I haven’t come across VPS yet, I want to learn more about the aspect of its administration.
Take this article visually - habrahabr.ru/post/132302
It says:
"1. Checking for updates.
The installation image from the hosting provider may not be very fresh.
[[email protected] ~]# yum update
There is something to update - we update. No - we are happy . "
So, what is "[[email protected] ~]# yum update" and where to enter it? In Putty?

Answer 1

Start with the classics: Unix and Linux. System Administrator's Guide . Where to download on torrents - figure it out for yourself.