Update Raspberry Pi OS safely with APT, understand full-upgrade, avoid routine experimental firmware, and plan major-version migrations with backups.
Install Raspberry Pi OS with the official Imager, safely select boot media, preconfigure accounts, Wi-Fi, and SSH, then complete first boot.
Configure Raspberry Pi OS securely with a custom account, SSH keys, locale, I²C or SPI interfaces, correct power, updates, and safe shutdown.