linux-sysadmin-journey/projects/02-command-line-mastery/levels/level-1/README.md

# Level 1: File System Navigator 📁

## Overview
Master the fundamentals of file system operations and navigation.

## Environment Setup
```bash
# Run the setup script
chmod +x ~/linux-sysadmin-journey/projects/02-command-line-mastery/setup/level1-setup.sh
./level1-setup.sh
```

## Stages

### Stage 1-1: The File Hunter
**Mission**: Master file search and manipulation techniques

**Challenges**:

1. **Basic Search** (100 points)
   ```bash
   # Find all .conf files modified in the last 3 hours
   # Expected output: At least config_*.conf files
   ```

2. **Content Search** (150 points)
   ```bash
   # Find all log files containing "ERROR" and count errors per file
   # Create a summary report
   ```

3. **Size-based Search** (200 points)
   ```bash
   # Locate files larger than 50MB
   # Create a report with file sizes in human-readable format
   ```

4. **Complex Search** (250 points)
   ```bash
   # Find empty files AND directories
   # Move them to ~/challenge/files/cleanup/
   ```

5. **Advanced Filter** (300 points)
   ```bash
   # Find files with specific permissions (600)
   # Generate a security report
   ```

**Bonus Challenge** (+500 points):
Create a script that:
- Monitors directory for new files
- Categorizes them by type
- Moves them to appropriate subdirectories
- Generates hourly reports

**Success Criteria**:
- [ ] All files correctly identified
- [ ] Commands properly documented
- [ ] Generated reports are accurate
- [ ] Used efficient search methods
- [ ] Implemented error handling

### Stage 1-2: Permission Puzzler
**Mission**: Master file permissions and access control

**Setup Script Features**:
- Creates complex directory structure
- Sets various permissions
- Simulates multi-user environment
- Creates access control scenarios

**Challenges**:

1. **Basic Permissions** (100 points)
   ```bash
   # Fix basic file permissions
   # Verify with ls -l
   ```

2. **Recursive Changes** (150 points)
   ```bash
   # Implement directory structure permissions
   # Maintain security best practices
   ```

3. **ACL Implementation** (200 points)
   ```bash
   # Set up ACLs for user groups
   # Test access scenarios
   ```

4. **Special Permissions** (250 points)
   ```bash
   # Configure SUID/SGID
   # Implement sticky bits
   ```

5. **Complex Scenario** (300 points)
   ```bash
   # Implement full web server permissions
   # Set up user access control
   # Configure automated permission updates
   ```

**Bonus Challenge** (+500 points):
Create a permission monitoring system that:
- Detects unauthorized changes
- Logs modification attempts
- Reverts unauthorized changes
- Sends notifications

## Scoring System
- Base points for completion
- Time bonus (varies by challenge)
- Efficiency bonus (fewer commands = more points)
- Style points for elegant solutions
- Documentation quality bonus

## Verification Scripts
```bash
# Run verification
./verify-level1.sh

# Check score
./check-score.sh
```