Linux bash/shell scripting

Commands: Syntax and examples help

comm - Compare 2 files
grep
wget
tar
date
sed

path

How to

Get the installed version [RHEL]
How to version lock a package/s [RHEL]
Install/Remove the DNF version lock plugin [RHEL]
Compare bash arrays
Determine if a number odd or even
Incrementing & Decrementing bash variables
Add a timeout to scripts
Get the last n characters from variable
shell redirection

Functions

Function to determine the boot type (UEFI or BIOS) [RHEL]
Function to validate a url

How to write error messages