fehlix wrote: configfile /sourcing ... grub.cfg :
This loads into the current running grub another grub-menu (grub.cfg).
The difference: As long as you have similar grub-versions this appear to behave identical.
Code: Select all
... configfile /boot/grub/grub.cfg ...
"configfile" means to stick with the example of @rej:
Its main bootloader from MX to sda3 is instructed to use the
configuration (/boot/grub/grub.cfg) from antiX17.2 to sda7 to load.
Different grub versions do not play a role. It is simple and efficient.
What I can't prove is the UEFI, because I don't own such a machine. However, this should work the same way if the UEFI installation on sda7 was done correctly. The main bootloader uses the grub.cfg of sda7.
None of this is new and not since yesterday. It is correct that an update-grub in the main boot loader sda3 takes longer than 30 seconds.
I already had 8 minutes with me, because he has to "collect" the data of ALL distributions via his os-prober.