Basic Centos 6 setup - where to start?

Question

CentOS

Hello, I have
just started learning linux.
I rented a VDS with centos 6 preinstalled to work in the field.
Installed apache, vsftpd, php, mysql. In principle, a simple site in php is already spinning.
Now, logically, it is worth paying special attention to server security issues - the question is, where to start?
And in general, what order should I follow when mastering linux? Is it normal to start acquaintance with the OS by setting it up for hosting?
Thank you.

Answer 1

For example like this .