Essential Linux Commands (Part- 4)

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👉 Welcome to Part 4 of 5 in our ongoing Linux essentials series! In this part, we’ll dive into commands that help you inspect your system, manipulate text, and begin your journey into shell scripting and variables.

If you haven’t read the earlier blogs, check them out for context:

Part 1: Basic Commands, File & Directory Operations, Permissions
Part 2: User Management, Processes, Disk & File System
Part 3: Archiving, Networking, and Package Management

📚 Table of Contents

1. System Information Commands
2. Text Processing Commands
3. Shell Scripting and Variables
4. Tips for Efficient Linux Usage

1. System Information Commands:
Scenario: Maya wants to audit a Linux VM before deploying a new application.

2. Text Processing Commands:
Scenario: Rajpreet is working with logs and needs to analyze patterns in large text files.

3. Shell Scripting and Variables:
Scenario: Alice wants to automate daily log archiving and add user-specific variables.

4. Tips for Efficient Linux Usage:

Keep scripts modular – Write reusable functions and comment your code.
Always test sed and awk on sample files before applying on production data.
Use top, htop, or uptime regularly to understand system load and resource usage.
Schedule your shell scripts with cron for automation (covered in Part 5).
Practice creating real-world scripts like backups, monitoring tools, or file renamers.