multiboot loader

[maxsteele]

My laptop is currently booting up with 4 different operating systems...Debian 9, Windows 7, Xubuntu, and Kubuntu; I want to modify the boot menu so that Windows 7 is at the top of the list, (default boot os). Which file do I modify and can I just cut and paste the menu entry section of the code for windows 7 to the top of the menu entry list?

[p.H]

Being the default is not the same as being at the top.
If the main boot loader is GRUB 2, you can change the default in /etc/default/grub (read carefully the comment at the top of the file) on the system which installed it.

[milomak]

are you asking us to assume you are using grub?

and if it is grub, which os controls grub?

[Head_on_a_Stick]

The OP can use https://packages.debian.org/stretch/boot-info-script to determine that.

Code: Select all

/usr/sbin/bootinfoscript

It's rubbish for UEFI systems though (IIRC) so in that case run

Code: Select all

efibootmgr -v

https://packages.debian.org/stretch/efibootmgr