Day 2/90: Essential Linux Commands for DevOps 🐧 #90DaysOfDevOps

Day 2: Mastering Basic Linux Commands 💻

Hello DevOps enthusiasts! 👋 Welcome to Day 2 of my #90DaysOfDevOps journey. Today, we're diving into the essential Linux commands that every DevOps engineer should know.

Why Linux Commands Matter? 🤔

In DevOps, Linux is everywhere - from development servers to production environments. Understanding basic Linux commands is like learning the alphabet before writing stories!

Essential Commands Breakdown 🔍

Listing Commands (ls) 📂

ls        # List directory contents
ls -l     # Long format listing
ls -a     # Show hidden files
ls *.sh   # List .sh files
ls -i     # Show inode numbers
ls -d */  # List directories only

Directory Navigation 🗺️

pwd           # Print working directory
cd ~          # Go to home directory
cd -          # Go to previous directory
cd ..         # Move up one level
cd ../..      # Move up two levels
mkdir dirname # Create directory

Practical Examples 💡

Let's create a basic DevOps project structure:

# Create project structure
mkdir -p DevOps/{Git,Linux/Scripts}

# Navigate and list
cd DevOps
ls -l

# Create a file
touch Linux/Scripts/first_script.sh

Common Use Cases 🛠️

1. File Organization

# Create multiple directories
mkdir -p project/{src,docs,tests}

# List contents recursively
ls -R

1. Project Navigation

# Move to project directory
cd ~/DevOps

# Check current location
pwd

# List all files including hidden
ls -la

Pro Tips 🌟

1. Use tab completion to save time
2. Remember your pwd command
3. Master relative vs absolute paths
4. Use ls -la to see all file details
5. Create organized directory structures

Common Mistakes to Avoid ⚠️

1. ❌ Forgetting where you are (pwd is your friend)
2. ❌ Not using tab completion
3. ❌ Ignoring hidden files
4. ❌ Using absolute paths when relative would be better

Today's Challenge 🎯

Create this directory structure:

DevOps/
├── Git/
│   └── Day-02.txt
├── Linux/
│   ├── Commands/
│   └── Scripts/
└── Docker/

Key Takeaways 📝

1. Linux commands are foundational for DevOps
2. Directory navigation is crucial
3. Proper organization saves time
4. Command options extend functionality

Let's Connect! 🤝

How do you organize your DevOps projects? Share your favorite Linux commands in the comments below!

Linux #DevOps #Technology #Learning #90DaysOfDevOps

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This is Day 2 of my #90DaysOfDevOps journey. Follow along as we explore different aspects of DevOps together!