Thursday, October 26, 2017

Step By Step Procedure To Change Boot Device In RHEL6



If you’ve ever come across a situation where there is a need to change the boot device then this document explains a step by step procedure with screen images on how to get this done. There are situations wherein the initial boot device selected is of less capacity and later there is a need to change this to something bigger one. So there is no way to increase the size of this drive since the next block device which is usually “/dev/sda2” starts from the sector wherein the “/dev/sda1” ended (*considering installation done in default mode).  Hence, we’ve to plan to move all the boot files onto a new, bigger block device and make that as a boot device.

I’m going to document each step with screenshots in this post which would help anyone who wish to perform the job of changing the boot device.

Friday, October 13, 2017

Main Differences Between MBR & GPT


A few points about GPT(GUID Partition Table) when compared with MBR(Master Boot Record) partitioning method for hard disk drives. The GPT is the standard for laying out partitions on physical hard drives for systems running with Unified Extensible Firmware Interface (UEFI). It is a standard disk partition layout for storage devices used in a desktop or server.

Friday, October 6, 2017

Simply Services Cheat Sheet


This is a simple table which would list out commonly used services with a quick look. I’ve tried to sum-up service configuration at the basic level, so, this table would provide a quick look on packages required to start service, config files to be used, ports to be opened via firewall, command to check for syntax errors(if any) and commands to bring up service. This is not an exclusive information regarding configuring a service in Linux, but just a quick look sheet. Also note that I've tried to list out most commonly used services.