Linux common boot issues and troubleshooting

Course details

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.

LINUX Basic Course Outline

Troubleshooting Linux Boot Problems in Red Hat Linux (Basic System Recovery)

• Linux Boot process

• Booting of RHEL 7 with systemd

• Labon Basic System Recovery (Initramfs file missing/Corrupted)

• Labon Basic System Recovery (Grub related issues like stage 1.5/2 grub is missing)-Part1

• Labon Basic System Recovery (Grub related issues like stage 1.5/2 grub is missing)-Part2

• Labon Basic System Recovery (Master Boot Record missing/corrupted)

• LabonBasic System Recovery (Critical files are missing like mount binary)

• LabonBasic System Recovery (/boot fs is completely wiped out or corrupted)

  
  

Red Hat Enterprise Linux 7

• Overview about RHEL7 with its new features

• Comparison with RHEL 6

• Lab on systemd service (Familiar with different systemdtargets & newcommands)

• Practice Lab Session on systemctl status/stop/start/enable/disable <service>

• Practice Lab Session on default target, list dependencies & journalctl etc

Booting modes in RHEL 7

• Rescue mode in RHEL 7

• Lab on rescue mode

• Emergency mode in RHEL 7

• Lab on emergency mode

• Troubleshooting mode (Overview and Lab)

• Labon Recovering theRoot password in RHEL7

  • Resetting the Root Password Using an Installation Disk

  • Resetting the Root Password Using rd.break

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

Increase Swap In Linux

• Overview of Memory/Swap

• Increase swap size using swap partition

• Increase swap using swap file