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README.md
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--- ---
## 📌 Overview ## Overview
This script automates the initial setup and security hardening of a fresh Debian or Ubuntu server. It is designed to be **idempotent**, **safe**, and suitable for **production environments**, establishing a secure baseline from which to build upon. This script automates the initial setup and security hardening of a fresh Debian or Ubuntu server. It is designed to be **idempotent**, **safe**, and suitable for **production environments**, establishing a secure baseline from which to build upon.
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## ✨ Features ## Features
- **Secure User Management:** Creates a new administrator user with `sudo` privileges and disables the root account's SSH access. - **Secure User Management:** Creates a new administrator user with `sudo` privileges and disables the root account's SSH access.
- **SSH Hardening:** Configures the SSH server to use a custom port, disable password authentication (enforcing key-based login), and apply other security best practices. - **SSH Hardening:** Configures the SSH server to use a custom port, disable password authentication (enforcing key-based login), and apply other security best practices.
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## 🚀 Installation & Usage ## Installation & Usage
### Prerequisites ### Prerequisites
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### 1. Download the Script ### 1. Download the Script
```bash ```bash
wget [https://raw.githubusercontent.com/buildplan/setup_harden_server/refs/heads/main/setup_harden_debian_ubuntu.sh](https://raw.githubusercontent.com/buildplan/setup_harden_server/refs/heads/main/setup_harden_debian_ubuntu.sh) wget https://raw.githubusercontent.com/buildplan/setup_harden_server/refs/heads/main/setup_harden_debian_ubuntu.sh
chmod +x setup_harden_debian_ubuntu.sh chmod +x setup_harden_debian_ubuntu.sh
``` ```
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## 🗂️ What It Does in Detail ## What It Does in Detail
| Task | Description | | Task | Description |
| ----------------------- | --------------------------------------------------------------------------- | | ----------------------- | --------------------------------------------------------------------------- |
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## 🪵 Logs & Backups ## Logs & Backups
- **Log Files:** `/var/log/setup_harden_debian_ubuntu_*.log` - **Log Files:** `/var/log/setup_harden_debian_ubuntu_*.log`
- **Configuration Backups:** `/root/setup_harden_backup_*` - **Configuration Backups:** `/root/setup_harden_backup_*`
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## 🧪 Tested On ## Tested On
- Debian 12 - Debian 12
- Ubuntu 24.04 LTS, 22.04 LTS - Ubuntu 24.04 LTS
- Common cloud providers (DigitalOcean, AWS, GCP, Oracle Cloud) and local VMs. - Cloud providers (DigitalOcean & Oracle Cloud) and local VMs.
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## 🛠️ Troubleshooting ## Troubleshooting
### SSH Lockout Recovery ### SSH Lockout Recovery