try to batch step 8 so it can be all copy-paste at once

        export LC_ALL=C.UTF-8 &&

        sudo ttyrec -a -e screen /var/log/upgrade-bookworm.ttyrec

        apt-mark manual bind9-dnsutils puppet-agent

        apt purge $(dpkg -l | awk '/^rc/ { print $2 }') # purge removed packages

        apt autopurge -y

        apt purge $(deborphan --guess-dummy)

        while deborphan -n | grep -q . ; do apt purge $(deborphan -n); done

        apt autopurge -y

        apt clean

        # review and purge older kernel if the new one boots properly

        dpkg -l 'linux-image*'

        # review obsolete and odd packages

        apt purge '?obsolete'

        apt list "?narrow(?installed, ?not(?codename($(lsb_release -c -s | tail -1))))"

        printf "End of Step 8\a\n"

        apt-mark manual bind9-dnsutils puppet-agent &&

        : purge removed packages &&

        apt purge $(dpkg -l | awk '/^rc/ { print $2 }') &&

        apt autopurge &&

        apt purge $(deborphan --guess-dummy) &&

        while deborphan -n | grep -q . ; do apt purge $(deborphan -n); done ^^

        apt autopurge &&

        apt clean &&

        ; review and purge older kernel if the new one boots properly &&

        dpkg -l 'linux-image*' | less &&

        ; review obsolete and odd packages &&

        apt purge '?obsolete' && apt autopurge &&

        apt list "?narrow(?installed, ?not(?codename($(lsb_release -c -s | tail -1))))" &&

        printf "End of Step 8\a\n" &&

        shutdown -r +1 "bookworm upgrade step 8: testing reboots one final time"

[this guide to free up space]: http://www.debian.org/releases/buster/amd64/release-notes/ch-upgrading.en.html#sufficient-space