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Update grub2.adoc

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Lukas Ruzicka 2017-12-13 12:45:40 +01:00
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en-US/modules/proc_adding-other-operating-systems-grub2.adoc
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= Adding other operating systems to the *GRUB2* menu
[[adding-other-operating-systems-to-the-grub-2-menu]]
[[adding-other-operating-systems-grub2]]
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.
Adding other records into the *GRUB2* menu only means to run `grub2-mkconfig` command to regenerate the configuration files. During this process, all operating systems known to the system will be added into the configuration. By reinstalling *GRUB2* into the MBR, this configuration will be used for further boots.
.Before you start
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.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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. Install *GRUB2* into the MBR of your primary hard disk.
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$ sudo grub2-install /dev/sda
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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.