Installing Linux is simple these days, you get instructions from a graphical installer with all the information and helpers that you may need. It's not like installing some odd Slackware 3.2 with a buggy 2.0 kernel (which happens to be the first Linux I at least tried to install). So let's start!
Step 1: Insert the CentOS Image
Open up VirtualBox and right-click on your instance, and select Settings (or click that nice looking Settings icon).
Step 2: Boot the Image
Important! When you click the screen of a VirtualBox instance, your mouse pointer will be transferred to that environment. If the server does not support mouse operation, you will have no mouse at all. To go out of the VirtualBox-mode, and get the mouse pointer back, press the right Ctrl button!
After you press the Start button, a new window will appear, and a boot loader will show some options, Click on the new window, and use the up/down arrows to select an option. Also practice "releasing" the virtual instance with the right Ctrl button.
The default option will show "Install or Upgrade an existing system", which you should select, so press Enter. Next, odd-looking text will flicker by for a few seconds, and you will be met by a asking if you should test the "install media". Select the Skip option, unless you have reasons to believe that your downloaded ISO-file is broken.
From here on, you will have a nice graphical interface!
Step 3: Localization
Step 4: Storage Settings
Step 5: Host Name
- FQDN: The host name should be formed as a domain path, e.g. frontend-001.eu-1.prod.araneo.local
- All-in-the-hostname: Everything goes into a stacked host name, e.g. ara-prodeu01fe001
Step 6: Time Zone
Please note: We will configure the server to use UTC at a later stage.
Step 7: root password
However, if you know that the server will have a public IP-address and for some reason needs to accept SSH-connections over public internet, and you for some insane reason needs to accept external root logins; then you should select a crazy-strong password here. And then use the time until your first DDOS/brute-force attack, to figure out a better IT-strategy.
Step 8: Storage Settings, again
Step 9: Installation
This takes you to the next chapter of the article: Step 3: Configure the Server.