Raspberry Pi

the regular commands for updating your Raspbian installation

$ sudo raspi-config

…

# the Debian APT = Advanced Packaging Tool

# update and upgrade

$ sudo apt-get update # update is used to resynchronize the package index files from their sources

$ sudo apt-get upgrade # upgrade is used to install the newest versions of all packages currently installed on the system from the sources enumerated in /etc/apt/sources.list