I've been a computer _user_ since early 60's [undergrad E.E. student].
I have used multi-boot since the days of Squeeze.
I wish to grok multi-boot.
I currently default to Debian 12 , other options are available.
After doing some years overdue disk housekeeping, I wish to *ADD* a
clean install of Trixie.
Some of the housekeeping will be for re-purposing some existing disk
partitions.
To safely do that, I need to know the details of the power on boot
sequence and what files are used.
I'm carefully not asking specific questions as decades of tech support
(in another field) has taught me that "wrong questions" can cause as
much grief as "wrong answers" ;{
TIA
