Grub 2

[ABSDoug]

Ultimately, I want to create a seperate partition for Grub 2. I've got quite a few partitions now. Uninstalling, reinstalling, testing. So I'm reading: http://kubuntuforums.net/forums/index.php?topic=3106368.0 & came across:

Key commands:   sudo grub-mkconfig and sudo grub-install
Use these two commands to "freshen up" your GRUB 2 installation.
grub-mkconfig: builds a new boot menu configuration file  boot/grub/grub.cfg.
grub-install:  builds a complete, fresh GRUB 2 installation, including /boot/grub/grub.cfg.

Does that mean Grub 2 *AUTOMATICLY* finds all the OS, the different kernels... all that it does it self??