sudo apt-get update sudo apt-get dist-upgrade sudo dpkg --audit sudo dpkg --get-selections | grep hold sudo apt-get clean vi /etc/apt/sources.list Für stretch deb http://mirrordirector.raspbian.org/raspbian/ stretch main contrib non-free rpi Für jessie deb http://mirrordirector.raspbian.org/raspbian/ jessie main contrib non-free rpi sudo rm -f /etc/apt/sources.list.d/* vi /etc/apt/sources.list.d/raspi.list Für jessie deb http://archive.raspberrypi.org/debian jessie main ui Für stretch deb http://archive.raspberrypi.org/debian stretch main ui sudo apt-get update sudo apt-get upgrade sudo apt-get dist-upgrade Aufräumen sudo apt-get autoremove sudo apt-get autoclean Neustart reboot