Up/Down/Crossgrading Ubuntu 24.04 Noble and Debian 13 Trixie to Debian 12 Bookworm

[muwlgr]

muwlgr | Up/Down/Crossgrading Ubuntu 24.04 Noble and Debian 13 Trixie to Debian 12 Bookworm

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Also please have a look at this intermediate research
Stripping down Ubuntu 24.04 before upgrading it to Debian