Connect & Prepare the Pi

Update Raspberry Pi OS

Refresh the software lists, install available operating-system updates and reboot before configuring storage or CasaOS.

Guide difficulty⭐⭐⭐⭐⭐ Beginner Friendly

Estimated time⏱️ Around 15–45 minutes

By the end of this guide you will have

Checked for available Raspberry Pi OS updates.
Installed all normal package upgrades.
Rebooted and reconnected through SSH.

Why update before installing anything else?

The operating system image may be older than the packages currently available. Updating now gives storage tools and later applications a clean, supported base.

Refresh the package list

sudo apt update

This command checks the configured software repositories. It does not install upgrades yet.

Install the updates

sudo apt full-upgrade -y

The process can take some time. Keep the SSH window open and do not interrupt the Pi.

Reboot

sudo reboot

The SSH window will disconnect. Wait two minutes, then reconnect using the same IP address.

Windows Terminal connected to the Linux server and ready to run sudo apt update — Run sudo apt update after connecting to the server through SSH.

Linux terminal showing successful sudo apt update and sudo apt upgrade commands — The update and upgrade checks have completed successfully with no packages left to install.