The Ultimate Bash Crash Course

How to read this guide

99% of people viewing this will not read this entire post in one sitting. That is how it was intended to be.

I use this as a reference — coming back to the section I need when I need it. I hope you find the same utility from it.

Table of Contents

General Bash

• Environment variables
• Shell Variables
• PATH variable

Common Commands

• grep
• awk and sed
• Less
• find and exec
• tar, gzip, gunzip

Regular Expressions

• Detailed Example Regular Expression

Bash Scripting

• Variable declarations
• Built-In Variables
• Command Line Arguments
• Reading user input
• for loops
• if-then statements
• Functions

Virtual Machines and SSH Protocol

• Permanently Add Keys to ssh-agent
• Transfer data from local computer to remote machine
• Transfer data from remote machine to local computer
• Downloading packages to your remote machine with wget
• Using VSCode with your remote machine

Networking on Command Line

• Your home network and the internet
• ifconfig
• ping
• traceroute
• netstat
• dig/host/whois

Process Management and System Management

• What is a Process?
• Processes Behind the Scenes
• Foreground vs. Background Processes
• ps and top commands (system performance management)
• lsof
• free, time

Conclusion

Environment variables