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README.md

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+# IPNG Router Backup
+
+SSH-based network device configuration backup tool with support for multiple device types and flexible authentication methods.
+
+## Features
+
+- **Multi-device backup**: Configure multiple routers in YAML
+- **Device type templates**: Reusable command sets per device type
+- **Flexible authentication**: SSH agent, key files, or password
+- **Selective execution**: Backup specific devices with `--host` flags
+- **Professional CLI**: Standard flags, version info, and help
+
+## Quick Start
+
+### Installation
+
+```bash
+# Install Debian package
+sudo dpkg -i ipng-router-backup_X.Y.Z_amd64.deb
+
+# Or build from source
+make build
+```
+
+### Basic Usage
+
+1. **Create configuration file** (`config.yaml`):
+
+```yaml
+types:
+  srlinux:
+    commands:
+      - show version
+      - show platform linecard
+      - info flat from running
+
+devices:
+  asw100:
+    user: admin
+    type: srlinux
+  asw120:
+    user: admin  
+    type: srlinux
+```
+
+2. **Run backup**:
+
+```bash
+# Backup all devices
+ipng-router-backup --config config.yaml --output-dir /backup
+
+# Backup specific devices
+ipng-router-backup --config config.yaml --host asw100 --output-dir /backup
+```
+
+3. **Check output**:
+
+```bash
+ls /backup/
+# asw100  asw120
+
+cat /backup/asw100
+# ## COMMAND: show version
+# Hostname             : asw100
+# Software Version     : v25.3.2
+# ...
+```
+
+## Authentication
+
+The tool automatically tries authentication methods in this order:
+
+1. **SSH Agent** (if `SSH_AUTH_SOCK` is set)
+2. **SSH Key File** (`--key-file` or default locations)
+3. **Password** (`--password` flag)
+
+## Documentation
+
+- **[Detailed Documentation](docs/DETAILS.md)** - Complete feature guide, configuration reference, and examples
+- **[Manual Page](docs/router_backup.1)** - Unix manual page
+- **[Changelog](debian/changelog)** - Version history and changes