All Linux OS Types

Well, maybe not 'all' of them.

There are many Linux distributions available today, and they all have commands that are specific to them, however there are a lot of Linux commands that are generic and work across most, if not all of the Linux flavours. This section then is dedicated to those commands that span the cosmos of Linux distros.
A lot of the syntax here is generic, but I use mostly CentOS (Red Hat RPM) and Raspbian (Raspberry Pi) so there will be some specific syntax that creeps in here and there.

Networking

Route Command

Show Gateway Address

Change Hostname

Default NIC Configuration Files

NIC Link Status

Disable IPV6

Misnamed IP Ports

IP Tables

Generate UUID for Network Interface

CentOS Bonding Interfaces

Show Connected Multicasts

Test Multicast Join

Using ffprobe to verify stream

tcpdump

File-Disk-Storage

Copy Move Delete

Check Disk Space

How to Find the Size of Folders

How to count all the files in a directory

Check Free Memory

ncdu - NCurses Disk Usage

Mount USB Stick

Unmount USB Stick

IOStat

Compress Entire Directory to tar archive

Remove Special Chars from Windows files

Permissions

Make a file Executable

Linux Permissions Introduction

Adding and Removing Linux Permissions

Adding and Removing Permissions Shorthand

Permissions for Directories

Create Folder with Current Date

CHOWN Examples

Debian SUDO Elevation

Tools and Applications

Using GREP

RSYNC Example

Writing a Shell Script

Using SSHPASS with RSYNC

wget Examples

dd - Partition Backup

nload - Network Load

Install htop

Using MD5 Hash

Installing htop

Using htop

Apache HLS Origin Server

Set Apache to Auto Start

System

SSH Keys Issue

RTFM

Force boot to Command Line

YUM

CentOS7 USB Boot Install Fail

How to set the CentOS-Base.repo

Simple EPEL Install

Install SSH

Load Keymap

Check Temperature

Cron Logging

Cron Automation

Linux Crontab Examples

Using Tee to Output to File and Screen

List running Processes Services