🛠️ Admin Automation Toolkit: Bash CLI Scripts for Linux System Management

A professional-grade toolkit for Linux system administrators, featuring robust Bash CLI scripts to automate core user management, system maintenance, backups, updates, firewall management, and system monitoring.

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📋 Overview

This toolkit demonstrates real-world Linux system administration tasks automated through modular, production-ready Bash scripting — with error handling, help menus, colorful outputs, and logging included.

Each script is designed for operational efficiency, clean terminal UX, and secure system management practices.

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🚀 Scripts Included

Script	Purpose
create_user.sh	Add a new user, set initial password, and force password change on first login
remove_user.sh	Safely delete a user and archive their home directory
backup_system.sh	Create compressed full system backups with timestamps
update_and_patch.sh	Fully update and upgrade the system with logging
log_cleaner.sh	Rotate and archive old system logs automatically
show_system_info.sh	Display system uptime, CPU load, disk usage, and memory usage
firewall_manager.sh	Open or close firewall ports easily (optional bonus script)

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✨ Key Features

• Professional CLI design with banners and colorful output
• Full --help menus for every script
• Graceful error handling
• Real-time system and user lifecycle management
• Logging of critical operations
• Timestamped backups and archival
• Firewall port management
• Modular and clean Bash scripting
• Linux-friendly and production-grade

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📂 Folder Structure

bash-admin-toolkit/
├── scripts/
│   ├── create_user.sh
│   ├── remove_user.sh
│   ├── backup_system.sh
│   ├── update_and_patch.sh
│   ├── log_cleaner.sh
│   ├── show_system_info.sh
│   ├── firewall_manager.sh
├── demos/
│   ├── create_user_demo.gif
│   ├── backup_demo.gif
│   ├── patch_demo.gif
│   ├── log_cleaner_demo.gif
│   ├── show_system_info_demo.gif
│   ├── firewall_manager_demo.gif
├── README.md

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📸 Demos

Script	Demo
Create User
System Backup
System Update & Patch
Log Cleaner
Show System Info
Firewall Manager

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🧐 Example Usage

# Create a new user
sudo ./scripts/create_user.sh -u devops_admin -p Welcome123!

# Remove a user safely
sudo ./scripts/remove_user.sh -u olduser

# Backup critical system folders
sudo ./scripts/backup_system.sh

# Update and patch the system
sudo ./scripts/update_and_patch.sh

# Clean up old logs
sudo ./scripts/log_cleaner.sh

# Show system stats
./scripts/show_system_info.sh

# Open firewall port 443
sudo ./scripts/firewall_manager.sh --open 443

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📜 Requirements

• Bash 4.0+
• Linux OS (Debian/Ubuntu preferred)
• Root permissions for most scripts
• ufw installed for firewall management (optional)

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📈 What I Learned

• Real-world automation of Linux system administration tasks
• Writing modular, maintainable Bash scripts
• Building user-friendly CLI interfaces
• Managing Linux system users, backups, logs, firewalls
• Logging operational tasks securely

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⚡ How to Run Locally

1. Clone this repo:

   git clone https://github.com/your-username/bash-admin-toolkit.git

2. Move into the project:

   cd bash-admin-toolkit

3. (On Linux) Make all scripts executable:

   chmod +x scripts/*.sh

4. Run any script (most require sudo):

   sudo ./scripts/create_user.sh --help

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🌟 Future Improvements

• Add an interactive menu-based launcher script
• Add system health checks before backups
• Extend support to CentOS/RHEL systems (yum, dnf)
• Build a web dashboard to manage scripts remotely

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💪 This project proves the ability to design, automate, and maintain core Linux administration workflows through modular Bash scripting, improving operational efficiency, system reliability, and security.