🌐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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