On 2025-09-28, Felix Miata <mrmazda@earthlink.net> wrote: > >> On Sun, Sep 28, 2025 at 15:25:49 -0000, Greg wrote: > >>>dpkg --print-architecture (userland) > >> This is the best answer, also >> dpkg --print-foreign-architectures >> to identify whether multiarch is configured. > > Best only if the installed OS boots. And if it doesn't boot what would be the purpose of knowing whether the unbootable OS installed on the disk is 32 or 64 bit?