From a214efc6ae2a8570ed7775a09987e230a596d670 Mon Sep 17 00:00:00 2001 From: 247LIKE <54342887+247like@users.noreply.github.com> Date: Fri, 12 Dec 2025 19:51:43 +0800 Subject: [PATCH] Revise README for language and formatting updates Updated language options and improved formatting in README. --- README.md | 143 +++++++++++------------------------------------------- 1 file changed, 28 insertions(+), 115 deletions(-) diff --git a/README.md b/README.md index 904825b..441e536 100644 --- a/README.md +++ b/README.md @@ -9,130 +9,40 @@
- 📖 English | 📖 中文文档 + 🇨🇳 中文文档 | 🇺🇸 English
--- - - -## 📖 English - -A production-ready, POSIX-compliant shell script designed to initialize Linux servers and harden SSH security in minutes. - -It safely handles **SSH key deployment**, **port changing**, **user creation**, **TCP BBR enablement**, and **system updates**, while ensuring compatibility across Debian, Ubuntu, CentOS, RHEL, and Alpine Linux. - -### ✨ Key Features - -* **Universal Compatibility**: Works flawlessly on **Debian 10/11/12**, **Ubuntu**, **CentOS 7/8/9**, **Alma/Rocky**, and **Alpine Linux**. -* **POSIX Compliant**: Written in pure `/bin/sh`. No `bash` dependency. Runs perfectly on `dash` (Debian) and `ash` (Alpine/Busybox). -* **Safety Architecture**: - * **Managed Config Block**: Inserts configuration at the **top** of `sshd_config` to strictly override vendor defaults (bypasses the Debian 12 `Include` trap). - * **Atomic Verification**: Validates config with `sshd -t` before restarting. Automatically rolls back on failure to prevent downtime. - * **Anti-Lockout**: If SSH keys fail to deploy, it **will not** disable password login, ensuring you don't lose access. - * **Firewall Awareness**: Automatically detects and configures `ufw` or `firewalld` if port is changed. -* **Smart Interactions**: - * Fetches public keys from **GitHub**, **URL**, or **Direct Paste**. - * **Random High Port**: Generates a random port between 20000-60000 and checks for availability using `ss`/`netstat`. - * **System Update** & **TCP BBR**: Optional one-click optimization. - -### 🚀 Quick Start - -Run the following command as **root**. - -#### Standard Run (Interactive) -```bash -curl -fsSL [https://raw.githubusercontent.com/247like/linux-ssh-init-sh/main/init.sh](https://raw.githubusercontent.com/247like/linux-ssh-init-sh/main/init.sh) -o init.sh && chmod +x init.sh && ./init.sh -```` - -#### Force English UI - -```bash -./init.sh --lang=en -``` - -### ⚙️ Command Line Arguments - -The script accepts the following arguments to control its behavior: - -| Argument | Description | -| :--- | :--- | -| `--lang=en` | Force the interactive interface to use **English**. | -| `--lang=zh` | Force the interactive interface to use **Chinese** (Default behavior asks if not specified). | -| `--strict` | **Strict Mode**. If enabled, the script will **exit immediately** if any critical step (like downloading keys or generating a port) fails, instead of falling back to defaults. Recommended for CI/CD or automated pipelines. | - -### ⚙️ Strict Mode vs. Normal Mode - -| Feature | Normal Mode (Default) | Strict Mode (`--strict`) | -| :--- | :--- | :--- | -| **Philosophy** | **"Don't Lockout"** (Best Effort) | **"Compliance First"** (Zero Tolerance) | -| **Key Failure** | If key download fails, script **keeps Password Auth enabled** and warns you. | Script **exits immediately**. No changes applied. | -| **Port Failure** | If random port generation fails, it falls back to **Port 22**. | Script **exits immediately**. | -| **Use Case** | Manual setup, unstable networks. | CI/CD pipelines, high-security requirements. | - -### 💡 Examples - -**1. Standard interactive installation (English):** - -```bash -./init.sh --lang=en -``` - -**2. Strict mode for high-security requirements:** -*If the GitHub key cannot be downloaded, the script will abort rather than falling back to password login.* - -```bash -./init.sh --strict -``` - -### 🛠️ Technical Logic - -1. **Dependency Check**: Auto-detects package manager (`apt`, `yum`, `apk`) and installs minimal dependencies (`curl`, `sudo`, `openssh-server`). -2. **User Setup**: Creates the specified user (if not root) and grants password-less `sudo` privileges. -3. **Key Deployment**: Fetches keys, validates format, fixes `.ssh` permissions (SELinux context safe), and writes to `authorized_keys`. -4. **Config Writing**: - * Backs up `sshd_config`. - * Removes old script-managed blocks. - * Writes a new block at the **beginning** of the file to ensure priority over `Include` directives. -5. **Finalization**: Validates config syntax, restarts SSH service, and applies BBR/Updates if requested. - ------ - -\