TryHackMe Linux Fundamentals Part 1

Introduction

• Presenter: John
• Objective: Learn the fundamentals of Linux, including essential commands on an interactive terminal.
• Target Audience: Beginners or those with minimal Linux experience, aiming to solidify skills.
• Recommendation: Complete all three parts of the Linux Fundamentals series to become proficient.

Task 1: Introduction to Linux

• OS Overview: Linux is a popular operating system, used in various devices like smart cars, Android devices, supercomputers, and game consoles.
• Customization: Highly customizable and lightweight.
• Focus: History of Linux, running first commands, file system interaction, user and group management.

Task 2: A Bit of Background on Linux

• Where is Linux Used?: Powering websites, car entertainment systems, point of sale systems, and critical infrastructures.
• Flavors of Linux: Based on UNIX, includes Ubuntu, Debian, etc.
• Ubuntu: Commonly used for both servers and desktops, low resource requirements.
• History: The first release of Linux was in 1991.

Task 3: Interacting with Your First Linux Machine

• Interactive Machine: Use a browser-based Ubuntu machine.
• To Start: Click the green start machine button.
• Machine Details: Includes IP address and expiration timer.

Task 4: Introduction to the Terminal

• Lightweight: Often no GUI.
• Command Line: Faster for system administration.
• Key Commands:
  • Echo: Repeats input (e.g., echo "hello world").
  • Who Am I: Shows current user.

Task 5: Interacting with the File System

• Commands:
  • LS: Lists files and directories.
  • CD: Changes directories.
  • CAT: Outputs file contents.
  • PWD: Prints current directory path.
• Exercises: Navigate directories, find files, and view contents.

Task 6: Searching for Files

• Find Command:
  • Locate files by name or pattern (e.g., using wildcards *.txt).
• Grep Command:
  • Searches inside files for specific text or patterns.*

Task 7: Introduction to Shell Operators

• Operators:
  • & (Background Operator): Runs commands in the background.
  • && (Logical AND Operator): Executes a second command only if the first is successful.
  • > (Output Redirector): Redirects output to a file, overwriting it.
  • >> (Append Operator): Appends output to a file, preserving existing content.

Task 8: Conclusions and Summaries

• Review: Essential commands, file system navigation, find and grep usage, shell operators.
• Next Steps: Practice these commands and move on to Linux Fundamentals Part 2.

Task 9: Transition to Part 2

• Machine Termination: Click the terminate button to close the active machine.
• Continuation: Follow the link to Linux Fundamentals Part 2 upon completion.