Update README with first-time setup guide

README.md

@@ -1,113 +1,112 @@
 # Update Manager
 
-Lightweight SSH-based update manager for Linux systems.
+Simple tool to check for available updates on multiple Linux servers via SSH.
 
 ---
 
-## Features
+## 🚀 First Time Setup
 
-- Check for updates across multiple hosts
-- SSH-based (no agents)
-- Simple host inventory
-- No external dependencies
+### 1. Install script
+
+```bash
+sudo mkdir -p /opt/update-manager
+sudo cp update-manager.sh /opt/update-manager/
+sudo chmod +x /opt/update-manager/update-manager.sh
+
+sudo ln -s /opt/update-manager/update-manager.sh /usr/local/bin/update-manager
+```
 
 ---
 
-## Installation
+### 2. Run for the first time
 
-git clone <repo-url>
-cd update-manager
-chmod +x update-manager.sh
-./update-manager.sh install
+```bash
+update-manager check
+```
 
-This will:
+This will automatically create:
 
-- Install the tool in /opt/update-manager
-- Create global command: update-manager
-- Create config files if missing
+```
+/opt/update-manager/hosts.conf
+```
 
 ---
 
-## Configuration
-
-Edit hosts:
+### 3. Edit hosts file
 
+```bash
 nano /opt/update-manager/hosts.conf
-
-Format:
-
-name ip ssh_user
+```
 
 Example:
 
+```bash
+# name          ip              user
 server1         192.168.1.10    user
 server2         192.168.1.20    user
+```
 
 ---
 
-## SSH (required)
+### 4. Setup SSH access (required)
 
-Passwordless SSH must be configured.
+From your main machine:
 
-ssh-keygen -t ed25519
+```bash
 ssh-copy-id user@192.168.1.10
+ssh-copy-id user@192.168.1.20
+```
 
-Repeat for all hosts.
-
-Test:
-
-ssh user@192.168.1.10
-
-Should work without password.
+Passwordless SSH is required for the tool to work.
 
 ---
 
-## Usage
+### 5. Run again
 
+```bash
 update-manager check
+```
 
 ---
 
-## Output
+## ✅ Example output
 
-server1        🔴 2 updates
-server2        🟢 up-to-date
-server3        ❌ connection failed
+```bash
+===== server1 (192.168.1.10) =====
+Up-to-date
+
+===== server2 (192.168.1.20) =====
+vim-common ...
+```
 
 ---
 
-## Config
+## ⚠️ Requirements
 
-/etc/update-manager.conf
-
-Default:
-
-HOSTS_FILE="/opt/update-manager/hosts.conf"
-SSH_OPTIONS="-o BatchMode=yes -o ConnectTimeout=5"
+* SSH access to all servers
+* SSH keys configured (`ssh-copy-id`)
+* Debian/Ubuntu-based systems
 
 ---
 
-## Notes
+## 📁 Hosts file format
 
-- hosts.conf and update-manager.conf are local files (not in Git)
-- .example files are templates
-- Existing config is not overwritten on reinstall
+```
+name    ip    user
+```
+
+Example:
+
+```
+web     192.168.1.10    ubuntu
+db      192.168.1.20    root
+```
 
 ---
 
-## Roadmap
+## 🧠 Notes
 
-- update command
-- parallel execution
-- scheduled checks
-- logging integration
-
----
-
-## Philosophy
-
-Keep it simple.
-
-- No agents
-- No dependencies
-- Just SSH
+* The hosts file is created automatically on first run
+* Lines starting with `#` are ignored
+* Empty lines are ignored
+* Requires passwordless SSH access