Linux Notebook

Linux Notebook is a collection of notes and examples covering essential Linux commands and concepts.

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Contributing

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🚀 Topics Covered

00 . Fundamentals

• 01 . Computer Hardware
  • 00 . Important Command : lscpu free -m , lspci , lsusb , lsmode , fdisk
  • 01 . Motherboard (System Board)
  • 02 . Processor - CPU
  • 03 . RAM
  • 04 . Buses
  • 05 . Hard Drives
  • 06 . Solid State Disks - SSD
  • 07 . Optical Driver
  • 08 . Managing Device
  • 09 . Video Display Devices
  • 10 . Power Supplies

01. Introduction

• 01 . Linux OS
• 02 . Package Management

02. Getting Help

• 01 . man command
• 02 . info command

03. Command Line Skills

• 01 . Shell Basic
• 02 . Command Syntax
• 03 . Options vs Arguments
• 04 . History : history command
• 05 . Variables : Local , Environment and Path variables
• 06 . Command Types : Internal , External , Aliases , Functions command
• 07 . Quoting : Double(" ") , Single( ' ' ) , Back( ``) , Escape Character ( \ )
• 08 . Control Statement : Semicolon(;) , Double Ampersand (&&), Double Pipe (||)
• 09 . File and Directions : Basic command mentioned (ls,ls-l,whoami,uname,pwd)

04. File and Directory

• 01 . Navigating Filesystem

  • 01 . Introduction
  • 02 . Linux Directory Structure
  • 03 . Printing Working Directory - pwd command
  • 04 . Changing Directory- cd command
  • 05 . Path : Releative and Absolute path
  • 06 . Listing Files : ls command

• 02 . Management

  • 01 . Globbing Character : * , ? , [] , !
  • 02 . Create : touch and mkdir command
  • 03 . View : cat , less , vmore,head,tail and|` command
  • 04 . Copy : cp , dd command
  • 05 . Move : mv command
  • 06 . Remove : rm command
  • 07 . Redirection : STDOUT , STDERR , STDIN command
  • 08 . Sorting : Sorting Fields & options
  • 09 . View File Statistics : wc command
  • 10 . Filter File Section : cut command
  • 11 . Filter File Content : grep command
  • 12 . Reguler Expression : grep with . [] [^] $ and + ? {} | ()

05 . Archiving & Compression

• 01 . Introduction
• 02 . Compressing : using gzip , bzip2 , xz tools
• 03 . Archiving Files : using tar
• 04 . Zip and Unzip Files

06 . Basic Shell Scripting ( .sh )

• 01 . Introduction
• 02 . Conditionals : if-else , test [] , swith-case
• 03 . Loop : for and while loop

07 . Nano and VI Editors

• 01 . Nano Editors
• 02 . VI Editors

08 . User and Group

• 01 . User and Access

  • 00 . Import Command List Here
  • 01 . Switching User command : su , sudo command
  • 02 . User Account : check exist user command - grep username /etc/passwd
  • 03 . System Accounts : etc/passwd and etc/shadow
  • 04 . Group Accounts : etc/group and etc/passwd
  • 05 . Viewing User Information : id command
  • 06 . Viewing Current Users : who and w command
  • 07 . View Login History : last command

• 02 . Create User and Group

  • 00 . Import Command List Here
  • 01 . Introduction on User Account
  • 02 . Introduction on Groups
  • 03 . Creating a Group : groupadd command
  • 04 . Group ID ,Name Considerations
  • 05 . Modifying a Group : groupmod command
  • 06 . Deleting a Group : groupdel command
  • 07 . Introduction on Users
  • 08 . User Configuration Files: useradd -D command
  • 09 . User Account naming Consideration: Username, UID, Primary group, Supplementary groups, Home directory, Skeleton directory, Shell, Comment (GECOS)
  • 10 . Creating a User
  • 11 . Updating User Passwords : passwd command
  • 12 . Modifying a User : usermod command
  • 13 . Deleting a User : userdel command

09 . Ownership and Permission

• 01 . Understanding File Permission Structure
• 02 . Switching Primary Group Temporarily : newgrp command
• 03 . Changing Group Ownership : chgrp command
• 04 . Changing File Ownership : chown command
• 05 . Changing File Permission : chmod command
• 06 . Default File Permissions : umask command
• 07 . File Permission and Ownership releated Q & A

10 . Special Directories and File

• 01 . setuid command
• 02 . setgid command

11. System Monitoring

• 00 . Important Command List Here
• 01 . Processes Theory : /proc output
• 02 . Process Hierarchy
• 03 . Viewing Process Snapshot : ps command
• 04 . Viewing Processes in Real Time : top command
• 05 . Memory : free command
• 06 . Log Files and Command : /var/log
• 07 . Kernel Messages and Command : dmesg command
• 08 . shutdown command

12. Network Configuration

• 00 . All Command List Here
• 01 . Network Terminology
• 02 . IP address Theory : IPv4 and IPv6
• 03 . Configuring Network Devices : Key Question
• 04 . Domain Name System (DNS) Theory
• 05 . Network Configuration Files : /etc/hosts , /etc/resolv.conf , etc/nsswitch.conf and DNS Name Resolution Flow
• 06 . ifconfig command — View Network Settings
• 07 . route command
• 08 . Ping — Test Network Connectivity
• 09 . netstat command
• 10 . ss command
• 11 . dig command
• 12 . host command
• 13 . ssh command