# Update Manager

Simple tool to check for available updates on multiple Linux servers via SSH.

---

## 🚀 First Time Setup

### 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
```

---

### 2. Run for the first time

```bash
update-manager check
```

This will automatically create:

```
/opt/update-manager/hosts.conf
```

---

### 3. Edit hosts file

```bash
nano /opt/update-manager/hosts.conf
```

Example:

```bash
# name          ip              user
server1         192.168.1.10    user
server2         192.168.1.20    user
```

---

### 4. Setup SSH access (required)

From your main machine:

```bash
ssh-copy-id user@192.168.1.10
ssh-copy-id user@192.168.1.20
```

Passwordless SSH is required for the tool to work.

---

### 5. Run again

```bash
update-manager check
```

---

## ✅ Example output

```bash
===== server1 (192.168.1.10) =====
Up-to-date

===== server2 (192.168.1.20) =====
vim-common ...
```

---

## ⚠️ Requirements

* SSH access to all servers
* SSH keys configured (`ssh-copy-id`)
* Debian/Ubuntu-based systems

---

## 📁 Hosts file format

```
name    ip    user
```

Example:

```
web     192.168.1.10    ubuntu
db      192.168.1.20    root
```

---

## 🧠 Notes

* The hosts file is created automatically on first run
* Lines starting with `#` are ignored
* Empty lines are ignored
* Requires passwordless SSH access

🖥️ Terminal UI

You can also use the interactive terminal menu:

update-manager-ui
Features

Check all hosts

View hosts file

Edit hosts file

Add host

Remove host

Requirements

The UI uses whiptail. Install it if needed:

sudo apt update && sudo apt install whiptail -y