Boot, Kernel, Recovery, and Tunables
Linux Boot Process
The below image outlines the typical flow of a Linux system boot. 1. BIOS (Basic Input/Outpu...
Troubleshooting Boot Issues & System Recovery
System boot logs The below log files are most relevant to viewing boot logs and errors dmesg ...
GRUB - Grand Unified Boot Loader
GRUB's responsibility in the boot process GRUB2 Installation There may come a time where y...
initrd (initialisation RAM disk)
What are initramfs and initrd? initrd and initramfs are temporary root filesystems loaded into...
Linux Kernel Overview
What is the Linux Kernel? The Linux kernel is the core software that acts as an interface betw...
Kernel Modules
What is a kernel module? A kernel module is essentially a piece of code that can be loaded int...
Kernel Tuneable's
Kernel Tunables In Linux, a tunable refers to a specific type of configuration setting within th...
Single User Mode
==================================================================================== You might n...
FSCK
==================================================================================== FSCK (File ...
Single User Mode
Boot the server into 'single user mode' B. Once in single user mode, we can look to initiate t...