Monday, May 4, 2020

Lets Upgrade From RHEL7 To RHEL8

It has been quite some time since RHEL8 was released. Red Hat has officially announced the upgrade support from RHEL6 → RHEL7 & RHEL7 → RHEL8. This is with certain conditions and limitations. One has to read the complete document from Red Hat to understand the caveats about it. As per the official documentation from Red Hat, only Server variant is supported. So, let’s first understand certain important limitations before we could plan the upgrade. 

Monday, March 16, 2020

How to completely disable boot or startup messages?

Yes, there are situations where we’d get to see such requirements. So, a system should not show any boot or kernel or any messages whatsoever when booting and it should simply trigger/show the final GUI or CLI login screen. That is right. Sometimes it would be required to create such a system. In most recent versions of systemd based systems this could be achieved by nullifying systemd boot logs along with other options. Lets see how to get this done.

Saturday, January 18, 2020

How-To Safely Remove A Storage Device From A Linux System

There are situations where we would be required to remove a storage device or LUN from a system and attach it to another system for some other important purpose. So, how could this be achieved? Yes, we could remove a storage device attached to a system safely provided the system has enough bandwidth to accommodate data on another available volume. In this blog page, I’ve tried to document all the steps with screen-shots to demonstrate the same procedure. I hope this helps someone and if so, please leave a comment or hit Like button. Thank you!