To upgrade the Raspberry Pi OS from an older version to the latest version called "bullseye" (which is a Debian based distribution), you can use the following steps:
Open a terminal on your Raspberry Pi and run the command:
sudo apt update
This will update the list of available packages and their versions.Run the command:
sudo apt full-upgrade
This will upgrade all installed packages to their latest version.Run the command:
sudo apt dist-upgrade
This will upgrade the entire operating system to the next version, in this case "bullseye"Run the command:
sudo apt autoremove
This will remove any packages that are no longer needed.Reboot your Raspberry Pi by running the command:
sudo reboot
It is always good to have backup of your important files before upgrading any system.
Please note that this process can take some time, depending on the speed of your internet connection and the number of packages that need to be upgraded.
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