How to upgrade Raspberry Pi OS and the installed packages

We will update all the packages and also the Raspberry Pi OS to the latest version

Step 1. Open a terminal window on the reTerminal and type the following

sudo apt update
sudo apt full-upgrade

Step 2. Reinstall kernel headers

sudo apt install raspberrypi-kernel-headers

Step 3. Reboot the reTerminal

sudo reboot

Now your Raspberry Pi OS and all the necessary packages are up to update!