Introduction to RedHat Enterprise Linux 8.0

RedHat has released RedHat Enterprise Linux 8.0 yesterday, 7th May 2019. Back in 14th November 2018 its released the beat version. We have gone through few of RHEL 8 guides using beta version and they are still valid. We can start downloading RHEL 8 ISO file by clicking here. The size of the ISO will be 7.1 GB.

Changes in RHEL 8.0

The new version focus on Hybrid cloud and extremely support for Developers in all factor. An outstanding operating system from RedHat for Containers, Artifical Intelligence and much more support for current and upcoming technologies. It comes with Kernel version 4.18 and there was a major version change of GCC compiler from 4.8.x to 8.2.1. Moreover, the Graphics will come with Wayland. The One and only default web browser Firefox for a long time now come with 60.5.11 version in RedHat Enterprise Linux 8.0.

Minimum & Maximum Supports

  • Minimum require memory will be 1.5GB
  • Maximum supported logical CPU’s x86_64 768/8192
  • Maximum memory support for x86_64 system will be 24TB

In filesystem limitation except for XFS nothing was changed, XFS maximum file size increased to 1 PetaByte. Maximum boot LUN size of UEFI will support 8Exabyte.

RedHat Enterprise Linux Lifecycle Support

In the Support perspective, the earlier version support is 10 years in 4 phases, With first 5.5 years full support by following 6th year it will be in Phase 2 as maintenance support 1 and rest of 3.5 years under maintenance support 2. In case if you require more support beyond 10 years we can purchase extended life support.

But in Red Hat Enterprise 8 reduced from four phases to 3 phases as follows, First 5 years of full support by following 5 years of maintenance support and additional we can take an addon for extended life support beyond 10 years. As usual, Minor release will be out every six months. By the end of 2019, we can expect to get RHEL 8.1.

Added Features:

  • AppStream for Yum
  • Cockpit with full GUI control
  • Recording session with Video Support
  • Startis Storage Pool
  • Made life easier with NFTables.
  • Massive support for Hybrid clouds, Containers & AI

RHEL 8 Based Certification Program

RedHat has introduced its certification program based on RHEL 8 as follows. Those who new to Linux required to take below path to become an RHCE certified Engineer. RH294 completely based on automation by using Ansible and Shell scripting.

  • RH124 Red Hat System Administration I
  • RH134 Red Hat System Administration II
  • RH294 Red Hat System Administration III: Linux Automation

If you are familiar with Unix/Linux operating system you can go ahead to take below Rapid course.

  • RH199 RHCSA Rapid Track

Installation Begin:

Boot from ISO or burn the ISO in any media to start the installation.

RHEL 8 booting from ISO
Booting from RHEL 8 media

Choose your preferred language during the installation

RHEL 8 Installation language
RHEL 8 Installation language

Before starting with installation summary screen will look as below.

RHEL 8 Installation Summary Screen
RHEL 8 Installation Summary Screen

Change the timezone by choosing appropriate timezone related to you. Click Done to come back to the Installation summary window.

Change the timezone in RHEL 8 Installation
Change the timezone

Click on Software selection to choose the required server build type. By default “Server with GUI” will be selected. I’m choosing “Minimal Install” to install with RedHat Enterprise Linux 8.0. Once selected click Done and back to Installation summary window.

software selection for RHEL 8 Installation
Software Selection or Server Type

Back to Installation Summary window to continue the installation by choosing the destination where we need to install the operating system. Choose the right disk and if required use the custom partition. Once completed click Done to go back Installation Summary window.

Installation Destination
Installation Destination

Back in Summary window click on KDUMP to configure the kdump by reserving memory. If the memory size in your server 1 to 64 GB it should be minimum 160 MB in size, in case your memory more than 64 GB it should reserve more than 256 MB. Click on Done and exit to Summary.

Enable Kdump and reserve memory
Enable Kdump and Reserve memory

From Summary window click on Network & Hostname to configure the network and hostname for our server. To configure the Interface click on “Configure” on right side bottom.

Configure Network and Hostname
Configure Network and Hostname

We will get the below window to configure the interface, Make sure to tick the “Automatically connect to this network when it available” if you required to configure a static IP we can configure the same by clicking on “IPv4 Setting” Tab. Once done click save and exit to Network window.

Configure Interface to start Automatically in RHEL 8
Configure Interface

Configure the Hostname in bottom and click Apply. We can verify the changed hostname in right side bottom of current window. By default the interface will be enable in case if it not enabled clock on On/OFF at the right side top corner. Once everything completed click Done to exit from Network & Hostname window.

Configuring Hostname and Enable Interface.
Configuring Hostname and Enable Interface.

Choose the purpose of the server and support subscription we have.

System Purpose
System Purpose

Once completed with choosing required setting now the Installation summary window will look similar to below. Click on “Begin Installation” to start the RHEL 8 Installation.

Configured-Summary-window
Configured Summary window

In the next window, it will prompt to create a root password for our server. In the same window in case if we required an additional administrative privilege or unprivileged account it can be created.

Create Root Password
Create Root Password

It will take 30 to 45 minutes to complete the installation depends on the software package we have selected.

Click Reboot to complete the RHEL 8 Installation.

Click Reboot to complete the RHEL 8 Installation
Click Reboot to complete the RHEL 8 Installation

After rebooting system will boot into the newly installed RHEL 8 Operating System.

The freshly installed RHEL 8 Up and running, Run few commands to verify the version of Installed Operating System.

# uptime
# cat /etc/redhat-release
RHEL 8 Up and Running
RHEL 8 Up and Running

That’s it, we have successfully completed with installing RedHat Enterprise Linux 8.

Conclusion:

We have seen what the features and how to guide for RHEL 8 installation, will continue with other upcoming articles related to RHEL 8. Subscribe to the newsletter and stay tuned. Feel free to provide your comment in below comment section.

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