If you have fresh centos installation on your computer, the first thing to do is create a user. Because if you just using root as your user login on your computer or your server, and later on your server get compromised, it will be easier…
Linux is a popular OS these days. If you want to install Linux on your computer especially install CentOS 6, you could use this tutorials. The CentOS in this tutorial is CentOS version 6.9.
How to setup time on the centOS 6. Setup the timezone and ntp of the server.