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56 lines
1.5 KiB
Text
56 lines
1.5 KiB
Text
[[setting-default-entry]]
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= Setting default entry for GRUB2
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Since `grub2-mkconfig` (and *os-prober*) cannot estimate which operating system, of those it finds, is to be marked as default, we usually are unable to predict the order of the entries in `/boot/grub2/grub.cfg`. To change the default layout, we need to set the default based on the `name` or `title`.
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.Before you start
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. Open `/etc/default/grub` and make sure these lines exist in the file.
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+
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----
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GRUB_DEFAULT=saved
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GRUB_SAVEDEFAULT=false
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----
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. If you needed to change the content of the `/etc/default/grub`, apply the changes to `grub.cfg`.
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+
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----
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# grub2-mkconfig -o /boot/grub2/grub.cfg
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----
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.Procedure
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. List all possible menu entries.
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+
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----
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# grep -P "^menuentry" /boot/grub2/grub.cfg | cut -d "'" -f2
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----
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. Select one of the displayed options and use it as an argument to set the default menu entry.
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+
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----
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# grub2-set-default <menuentry>
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----
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. Verify the default menu entry
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+
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----
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# grub2-editenv list
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----
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. Regenerate the *GRUB2* configuration file and reinstall the bootloader into the MBR, as described in link:#adding-other-operating-systems-grub2[Adding other operating systems to the *GRUB2* menu].
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.More information
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If you understand the risks involved, you can manually modify the `/boot/grub2/grub.cfg` file. In that case, set the number of the default operating system using the `set default` variable.
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For example:
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----
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set default="5"
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----
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[NOTE]
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====
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If you edit the configuration file manually, the settings will be overwritten each time the `grub2-mkconfig` command runs.
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====
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