🌐Linux101 References

• Linux101 Course

• TCM Linux101-Resources - by Brent Eskridge

  • Supplementary exercises

Introduction

• Linux Distributions Timeline

  • Ubuntu

  • Kali

  • ParrotOS

• VirtualBox Ubuntu Installation

Command Line basics

• The Linux man-pages project

• Explain-Shell

• Shell-How

• Command-not-found

• ls

• less

• cat

• Bash Aliases

Files and the Filesystem

• Filesystem Hierarchy Standard

• FHS - Wikipedia

• df

• du

  • Size of a directory

• Absolute vs Relative Path

• cp

• rm

• Shell Expansions

• tail

• diff

• Soft Link And Hard Link

• tar

• gzip

• find

• which

• locate

Users and Groups

• UID

• who

• /etc/passwd

• /etc/shadow

• /etc/group

• Linux File Permissions

• chmod

  • chmod Calculator

• chown

• sudo

• passwd

  • root password

Installing Software

• Deb Packages install

• apt

• Rpm Packages install

• yum

• gcc

• checkinstall

Shell basics

• Common Shells

• Bash

• zsh

  • Oh My Zsh

• Learn Shell

• Environment Variables

• Bash Startup Files

• Bash Write to File

• History

Utilities and File editors

• grep

  • Regex in Grep

• sort

• wc

• sed

  • sed Manual - gnu.org

• awk

  • awk Manual - gnu.org

• tr

• ping

• ifconfig

• ip

• Listening Ports

• scp

• rsync

  • rsync over SSH

• file

• nano editor

  • nano usage

  • nano keyboard shortcuts

• vim

  • vim help files

  • vim cheat sheet

Process Management

• ps

  • pstree

• top

  • htop

• jobs-fg-bg Background processes

• Zombie Process

• Kill a Process

  • kill

  • pkill

• sleep

• crontab.guru

  • crontab

  • List cron jobs

• Linux Run Levels

  • Ubuntu Bootup

Regular Expressions

• grep Regular Expressions

  • grep regex examples

• Online RegExr tool

• Regex101 tool

• Cyrilex tool

• EmailRegex Examples

Bash Scripting

• Bash Shell Scripting - Wikibooks

• shebang

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