Linux Admin Toolkit

🚀 A comprehensive collection of interactive shell scripts that makes Linux system administration simple, efficient, and enjoyable!

🌟 Overview

Linux Admin Toolkit is a powerful suite of interactive bash scripts designed to simplify system administration tasks on Red Hat-based Linux distributions. Whether you're a seasoned sysadmin or just starting out, these tools provide an intuitive menu-driven interface for complex administrative tasks.

Why Linux Admin Toolkit?

• 🎯 No more memorizing commands - Everything is menu-driven
• 🛡️ Built-in safety checks - Confirmation prompts for critical operations
• 📊 Beautiful visual output - Color-coded results and Unicode formatting
• 🔧 All-in-one solution - From system checks to automation
• 📈 Real-time monitoring - Live system statistics and trends

✨ Features

🔍 System Check Script

• Comprehensive system analysis with 15 different check modules
• Real-time performance monitoring
• Security audit capabilities
• Automated health scoring system
• Detailed reporting functionality

🤖 System Automation Script

• 15 powerful automation modules
• One-click system optimization
• Automated backup solutions
• Service monitoring and recovery
• Emergency recovery options

📋 Requirements

• Operating System: Red Hat Enterprise Linux, CentOS, Fedora, Rocky Linux, AlmaLinux
• Privileges: Root access required
• Shell: Bash 4.0+
• Dependencies: Standard Linux utilities (automatically checked)

🚀 Installation

# Clone the repository
git clone https://github.com/Pavel-P09/Linux-Admin-Toolkit.git

# Navigate to the directory
cd linux-admin-toolkit

# Make scripts executable
chmod +x system_check.sh system_automation.sh

# Run system check
sudo ./system_check.sh

# Run automation suite
sudo ./system_automation.sh

💻 Usage

Both scripts feature an intuitive numbered menu system. Simply run the script and choose an option:

# For system analysis
sudo ./system_check.sh

# For automation tasks
sudo ./system_automation.sh

📊 Script 1: System Check

The System Check script provides comprehensive system analysis through 15 specialized modules:

1️⃣ System Information

• 🖥️ OS version and kernel details
• 🏗️ System architecture
• 🌐 Hostname and domain info
• ⏱️ Uptime and system load
• 👥 Active users monitoring

2️⃣ Hardware Information

• 🔧 CPU specifications (cores, threads, cache)
• 💾 Memory configuration and slots
• 💿 Storage devices and partitions
• 🎮 PCI devices (GPU, network cards)

3️⃣ Network Configuration

• 🌐 Interface status with IP addresses
• 🛣️ Routing tables
• 📡 DNS configuration
• 🔌 Active connections
• 🛡️ Firewall status

4️⃣ Disk Usage Analysis

• 📊 Filesystem usage with types
• ⚡ Real-time I/O statistics
• 📁 Largest directories finder
• 🗂️ Inode usage monitoring

5️⃣ Security Audit

• 🔒 SELinux status check
• 🚫 Failed login attempts
• 🔓 Open ports analysis
• ⚠️ SUID files detection
• 🔑 Password policy review

6️⃣ Service Status

• ❌ Failed services detection
• 📈 CPU usage by service
• ⏱️ Boot time analysis
• ✅ Critical services monitoring

7️⃣ User and Group Audit

• 👤 Users with shell access
• 🔐 Sudo privileges audit
• 📅 Login history
• 📊 Resource limits
• 🔑 Password expiration check

8️⃣ Package Management

• 📦 Installed packages count
• 🆕 Recently installed packages
• 🔄 Available updates
• 🔧 Broken dependencies check
• 📚 Repository status

9️⃣ Performance Analysis

• 🎯 Top CPU consumers
• 💭 Top memory consumers
• 📊 Virtual memory statistics
• 🔥 Per-core CPU usage

🔟 Log Analysis

• 🚨 Recent system errors
• 🔐 Authentication logs
• 💻 Kernel messages
• 📏 Log file sizes

1️⃣1️⃣ System Health Score

• 🏆 Automated scoring (0-100)
• 🎨 Color-coded health status
• 📋 Issue identification
• 💡 Health recommendations

1️⃣2️⃣ Backup Status

• 💾 Backup location scanning
• 📅 Recent archives listing
• ⏰ Scheduled backup jobs

1️⃣3️⃣ Resource Trends

• 📈 CPU usage history
• 💾 Memory usage trends
• 🌐 Network traffic monitoring

1️⃣4️⃣ System Recommendations

• 🧠 Intelligent system analysis
• 💡 Optimization suggestions
• ⚠️ Problem identification
• 🔧 Actionable advice

1️⃣5️⃣ Generate Full Report

• 📄 Comprehensive system report
• 💾 Timestamped saving
• 👁️ Report preview

🔧 Script 2: System Automation

The System Automation script provides powerful automation capabilities through 15 specialized modules:

1️⃣ Backup System Configurations

• 🗄️ Automated config backups
• 📦 Compressed archives
• 🕐 Timestamped organization
• 📋 Backup summaries

2️⃣ User Management

• 👥 Bulk user creation
• 🔑 Automated password generation
• 🗑️ Inactive user cleanup
• 🔒 Account locking/unlocking
• 📅 Password policy enforcement

3️⃣ Log Rotation and Cleanup

• 🔄 Automatic log compression
• 🗑️ Old log deletion
• ✂️ Large log truncation
• 🧹 Journal cleanup

4️⃣ System Updates

• 🔍 Update availability check
• 🛡️ Security-only updates
• 📦 Full system updates
• 🎯 Specific package updates
• ⏰ Scheduled auto-updates

5️⃣ Disk Space Management

• 🧹 Package cache cleanup
• 🌰 Old kernel removal
• 🗑️ Temporary file cleanup
• 🔍 Large file finder
• 🐳 Docker cleanup

6️⃣ SSL Certificate Management

• 📜 Certificate expiry monitoring
• ⚠️ Expiration warnings
• 🔐 Self-signed cert generation
• 💾 Certificate backups
• 🔍 Certificate details viewer

7️⃣ Firewall Rules Management

• 🛡️ Rule listing and editing
• ➕ Service/port addition
• ➖ Rule removal
• 💾 Configuration backup
• 🔄 Rule restoration

8️⃣ Service Monitoring

• 🔍 Critical service checks
• 🔄 Auto-restart configuration
• 📝 Monitor script creation
• 📊 Service logs viewer
• 🔧 Failed service recovery

9️⃣ System Cleanup and Optimization

• 🧹 10-step cleanup process
• 💾 Memory cache clearing
• 📦 Package cleanup
• 🗑️ Orphaned package removal
• 📧 Mail queue check

🔟 Performance Tuning

• ⚙️ Kernel parameter optimization
• 💾 Swappiness configuration
• 🔥 CPU governor settings
• 🌐 Network optimization
• 💿 I/O scheduler tuning

1️⃣1️⃣ Database Maintenance

• 🗄️ MySQL/MariaDB support
• 🐘 PostgreSQL support
• 💾 Automated backups
• 🔧 Table optimization
• 📊 Size analysis

1️⃣2️⃣ Generate Reports

• 📊 Daily system summaries
• 🔒 Security audit reports
• 🎯 Performance reports
• 👥 User activity reports
• 📧 Email integration

1️⃣3️⃣ Container Management

• 🐳 Docker support
• 🦭 Podman support
• 🧹 Resource cleanup
• 📊 Container statistics
• 🔄 Image updates

1️⃣4️⃣ Network Monitoring

• 📊 Bandwidth monitoring
• 🔌 Connection statistics
• 🔍 Port scanning
• 🌐 DNS performance
• 📈 Interface statistics

1️⃣5️⃣ Emergency Recovery

• 🔑 Root password reset
• 💾 System restoration
• 🔧 Package repair
• 🗄️ RPM database rebuild
• 🌐 Network reset

📸 Screenshots

Main Menu

╔═══════════════════════════════════════════════════════════════════════════════╗
║                          SYSTEM CHECK UTILITY v2.0                            ║
╚═══════════════════════════════════════════════════════════════════════════════╝
Current Time: 2024-01-15 10:30:45

MAIN MENU
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
1)  System Information
2)  Hardware Information
3)  Network Configuration
[...]
Select an option [0-15]: 

System Health Score

▶ SYSTEM HEALTH SCORE
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Overall System Health Score: 
85/100 - GOOD

Issues Found:
● High disk usage on /var (87%)
● 2 failed services

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

1. Fork the Project
2. Create your Feature Branch (git checkout -b feature/AmazingFeature)
3. Commit your Changes (git commit -m 'Add some AmazingFeature')
4. Push to the Branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

📜 License

This project is licensed under the MIT License - see the LICENSE file for details.

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Made with ❤️ by System Administrators for System Administrators

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