How to install Centos 7 Minimal in Oracle VM VirtualBox

Introduction

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What is Centos 7?

CentOS is a Linux distribution that provides a free, enterprise-class, community-supported computing platform functionally compatible with its upstream source, Red Hat Enterprise Linux

What is Virtual Machine?

In computing, a virtual machine is an emulation of a computer system. Virtual machines are based on computer architectures and provide functionality of a physical computer.

Why should you use Centos 7 and VirtualBox?

Well, they’re free and beginner friendly (I think lol )

Prerequisites :

You need to download these and install Virtual Box in your Windows system

• VirtualBox
  
• Centos 7 Minimal

Note

Press (right CTRL in your keyboard) to take your mouse cursor out of the Virtual Machine

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Getting Started

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1.) Create your Virtual Machine

Fig. 1 - Name your server, Select Linux as Type and Select Red Hat (64bit) then click Next. Just select your desired RAM and HDD space for your Virtual Machine, I like mine with 20GB HDD and 4GB RAM

Fig. 2 - It will look like this after you’re done creating your Virtual Machine

2.) Configuring your Virtual Machine’s network

Fig. 3 - Right click your Virtual Machine(Codeception), select settings -> network -> adapter 1, then enable network adapter and changed Attached to: FROM NAT to Bridged Adapter

3.) Installing Centos 7 Minimal in your Virtual Machine

Fig. 4 - Double click your Virtual Machine, then find your Centos 7 Minimal .iso file

Fig. 5 - Navigate with your up and down arrow keys, then select Install Centos 7

Fig. 6 - Just click that Continue button

Fig. 7 - Click NETWORK & HOST NAME

Fig. 8 - toggle ON switch to automatically set up your network settings

Fig. 9 - You should see your IP there

Fig. 10 - Set up your ROOT password and user account for the server

Fig. 11 - This is how it should look like after setting up your root password and user account, reboot after Centos 7 Installation

4.) Accessing your Centos 7 Minimal server via puTTy

Fig. 12 - Login using your root/user account, type ip a in your centos 7 minimal OS, it will show your IP address. you’ll need it to access your server via PuTTy

Fig. 13 - Open your puTTy, then type in your IP address in the IP Address textbox, then click open. sorry about the background lol

Fig. 14 - Just click Yes

Fig. 15 - Tadaa! we can now login to our server via puTTy! Enjoy!

5.) Initial setup

Disable SELINUX

command : sestatus

Fig. 16 - Check if SELINUX is enabled

command : vi /etc/sysconfig/selinux

Fig. 17 - vi /etc/sysconfig/selinux results, click I in your keyboard to insert texts

Fig. 18 - selinux=disabled, after editing press esc button, type :wq then click enter to save and exit

Fig. 19 - This is how it should look like even after editing the selinux file, because you need to reboot. to reboot, just type reboot then press enter

Fig. 20 - Selinux is now disabled

Disable FIREWALL

command :
systemctl disable firewalld
systemctl stop firewalld
systemctl status firewalld

Fig. 21 - Result after executing above command

Thank you for reading!