update-manager/README.md

Update Manager

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

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🚀 First Time Setup

1. Install script

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

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2. Run for the first time

update-manager check

This will automatically create:

/opt/update-manager/hosts.conf

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3. Edit hosts file

nano /opt/update-manager/hosts.conf

Example:

# name          ip              user
server1         192.168.1.10    user
server2         192.168.1.20    user

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4. Setup SSH access (required)

From your main machine:

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.

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5. Run again

update-manager check

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✅ Example output

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

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

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⚠️ Requirements

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

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📁 Hosts file format

name    ip    user

Example:

web     192.168.1.10    ubuntu
db      192.168.1.20    root

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🧠 Notes

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