I’ve got a question about the boot order. See I’m trying to set up a simple dualboot with ubuntu 16.04(server) on one ssd and 18.04(server) on the other.
In the grub the order is
16.04 16.04advanced mode 18.04 18.04advanced mode
When I log in to the 16.04 and edit grub,the GRUB_DEFAULT=0 means it will launch 16.04 on the next boot,but if I change it to GRUB_DEFAULT=2 it launches 18.04
Once in 18.04,if I change the line to GRUB_DEFAULT=0, it boots only 18.04(unless I manually pick 16.04),and no matter what order number I specify it still launches 18.04
Got any ideas what could help ?