= Adding other operating systems to the *GRUB2* menu
[[adding-other-operating-systems-to-the-grub-2-menu]]

Normally, *GRUB2* is preset to boot multiple operating systems during the Fedora installation process. If you can, it is advisable to install non-Linux operating systems first. Then, during the installation process, all those operating systems and their locations will be discovered and properly set.

Sometimes, however, you cannot use this approach and you will have to create the bootloader configuration file again to enable it to boot more operating systems.

.Before you start

* Make sure that the operating systems are on disks, connected to the system.
* You have the `os-prober` package installed.

.Procedure

. Install *GRUB2* into the MBR of your primary hard disk.
+
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$ sudo grub2-install /dev/sda
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. Recreate the *GRUB2* configuration file.
+
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$ sudo grub2-mkconfig -o /boot/grub2/grub.cfg
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.More information
* The `grub2-mkconfig` command will add entries for all operating systems it can find.  
* When problems appear, see the link:http://www.gnu.org/software/grub/manual/grub.html#Multi_002dboot-manual-config[GRUB manual] to solve issues with booting secondary operating systems.