Administrator's Reference Guide

Top 35 Linux interview questions | Linux interview question and answer - RHEL6/7 Linux interview question and answer: In this article, we will discuss multiple Linux basics interview questions and also help us to solve day to day Linux related issues and enhance our knowledge. This topic includes all commands which is very help full for Linux command interview questions also. Linux boot up process | boot process in linux step by step How to Hide Apache and PHP version from HTTP Headers in RHEL Different Run Levels in Linux Comparison of the service utility with systemctl – RHEL-7   How to Enable or Disable services on boot with chkconfig | systemctl – RHEL-6/7/8   YUM Update ERROR: 28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 30 seconds' Trying other mirror   Remove RPM-package/Disable YUM Repository – RHEL and CentOS   How to Set Up and Configure latest yum repository on CentOS   Update CentOS packages using yum upda...

Linux boot up process | boot process in linux step by step : 6 Stages In this topic we will discuss linux boot process , boot process in linux step by step. linux boot up process divided in 6 stages as below. Boot process for linux : 6 Stages   BIOS Basic Input/Output system executes MBR MBR Master Boot Record executes GRUB GRUB Grand Unified Bootloader executes kernel Kernel Kernel executes /sbin/init init Init executes runlevel programs Runlevel Runlevel programs are executed   from /etc/rc.d/rc*.d/ Here we will discuss all stages for boot process of linux step by step : 1. BIOS BIOS stands for Basic Input/Output System. Searches, loads, and executes the boot loader program and Performs some system integrity checks. BIOS loads and executes the MBR boot loader   2. MBR MBR stands for Master Boot Record. located in /dev/hda, or /dev/sda ...