Linux common boot issues and basic system recovery

person icon Shikhar Verma

Linux common boot issues and basic system recovery

Familiar with common Linux boot problems and gets hands on experience on basic system recovery with various lab sessions

updated on icon Updated on Sep, 2023

language icon Language - English

person icon Shikhar Verma

architecture icon Linux Administration,IT & Software,Operating Systems


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Course Description

By the end of the course you will:

Be able to familiar with common Linux boot problems and gets hands on experience on basic system recovery with various lab sessions.

Be able to confidently use the Linux operating system to increase your productivity and Career.

Be able to perform everyday computing tasks from the Linux command line.

Troubleshooting Linux Boot Problems (Basic System Recovery)


Overview of the Course Module

Links to download RHEL, CentOS, VMWare Workstation or Oracle Virtual Box

Create Linux OS 8 Template using VMWare Workstation

Installation of Linux OS 8 using VMWare Workstation

Installation of Linux OS 8 using Oracle Virtual Box

Connect from putty

About RedHat Linux 8

Overview of Linux OS 8

Features of Linux OS 8

Controlling Services and Daemons

Introduction to Systemd, Systemd units

Lab on systemctl command and journal

Controlling the Boot Process

Booting Process of a RHEL 8 System

Selecting a systemd target, rebooting & shutting

Lab Exercise - Determine the default target and change the target into running system.

Lab - Selecting a rescue mode at boot time

Resetting a root password

Repairing Systemd Boot Issues

Booting RHEL 8 into Rescue Mode

Booting RHEL 8 into Emergency Mode

Enabling the Early Debug Shell

Repair a File System Issues at boot

Lab - Repair a File System

Troubleshooting Boot Problems based on RHEL7

initramfs file is missing

grub conf is missing

mbr is corrupted

fstab file missing or bad entry

Last Lecture

GRand Unified BootLoader (Grub2)

Overview of Grub

Grub Configuration file

Features of Grub2 and its comparison with Legacy Grub

Practical Lab Session - Different commands to run at Grub2 prompt

Practical Lab Session - Boot from Grub (Selecting Kernel & Initramfs)

Practical Lab Session - How to make your grub password protected


What will you learn in this course:

  • Troubleshooting Linux Boot Problems
  • Basic System Recovery
  • Booting of Linux with systemd
  • Initramfs file missing/Corrupted
  • Grub related issues
  • Master Boot Record missing/corrupted
  • Critical files are missing like mount binary
  • Familiar with different systemd targets & new commands
  • Practice Lab Session on default target, list dependencies & journalctl etc
  • Booting modes in Red Hat Linux
  • Rescue/Emergency/Troubleshooting mode in Red Hat Linux
  • Resetting the Root Password Using rdbreak
  • Installation of Linux Operating System
  • GRand Unified Boot Loader (Grub2)


What are the prerequisites for this course?

  • PC or Laptop with internet Connection
  • There is no formal prerequisites for this course; however, previous system administrator experience on Linux operating system would be very beneficial.
Linux common boot issues and basic system recovery


Check out the detailed breakdown of what’s inside the course

1 Lectures
  • play icon Introduction 04:59 04:59
Installation of Linux Operating System
7 Lectures
Overview of RHEL 8
6 Lectures
Controlling the Boot Process
9 Lectures
Troubleshooting Boot Problems based on RHEL7
4 Lectures
GRand Unified Boot Loader (Grub2)
8 Lectures

Instructor Details

Shikhar Verma

Shikhar Verma

Solution Architect
Hi there, my name is Shikhar Verma And I love making complex technical topics easy to understand. I have been in the IT Industry for more than 12 years and I had started my career as a Unix and Linux System Engineer in 2005 and currently working as solution architect in multinational company and also a professional IT trainer. My passion is to work in an environment where my technical skills and experience is put to proper use for the prospective growth of company & his career. And I'm here on to teach what I know in an approachable way. I started teaching courses in 2017, and have taught over 20,000 students. I am grateful every day with being able to connect with so many students in almost every country around the world. Primary Skills are Linux, Red Hat Cluster, Ansible, Shell Scripting, AWS Cloud (Amazon Web Services), Linux Cluster, Perl etc Environment: HP Servers (Itanium/PA-RISC), Superdome 2 8s,16s & 32s, 9000/RX Series Server running HP-UX 11iv1, v2 and v3, HP P & C Class Blades Servers c7000 running HP-UX/RHEL8,7,6 etc.

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