How to upgrade Debian 11 (bullseye) to 12 (bookworm)

    Upgrade the current stretch installation to the latest packages.

    apt update && apt upgrade && apt dist-upgrade && apt clean && echo OK

     

    Perform some cleanup

    apt --purge autoremove
apt autoclean

     

    Perform database sanity and consistency check.

    dpkg --audit

     

     Fix any output from this command.Check for any packages which are held back.

    apt-mark showhold

     

    Point apt to the buster sources.

    sed -e 's/bullseye/bookworm/g' -i /etc/apt/sources.list

     

    Perform the upgrade, downloading packages in advance.

    apt update && apt clean && echo OK

    apt upgrade --without-new-pkgs -d -y && echo OK

    apt upgrade --without-new-pkgs -y && apt clean && echo OK

     

    Perform the upgrade, downloading packages in advance.

    apt full-upgrade -d -y && echo OK

    apt full-upgrade -y && apt clean && echo OK

     

    Reboot.

     

    Perform some cleanup

    apt --purge autoremove

     

    No questions yet.

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