upgrade debian 11 to 12

apt update
apt upgrade
apt update
apt full-upgrade
apt autoremove
apt --purge autoremove
reboot
apt-mark showhold
apt list '?narrow(?installed, ?not(?origin(Debian)))'
mkdir ~/apt
cp /etc/apt/sources.list ~/apt
cp -r /etc/apt/sources.list.d/ ~/apt
cp /etc/apt/sources.list ~/apt
cp -r /etc/apt/sources.list.d/ ~/apt
sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list
sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list.d/*
nano /etc/apt/sources.list
apt update
apt upgrade --without-new-pkgs
apt full-upgrade

Subscrever