mirror of
https://pagure.io/fedora-docs/quick-docs.git
synced 2024-11-24 21:35:17 +00:00
56 lines
1.5 KiB
Text
56 lines
1.5 KiB
Text
[[setting-default-entry]]
|
|
= Setting default entry for GRUB2
|
|
|
|
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`.
|
|
|
|
.Before you start
|
|
|
|
. Open `/etc/default/grub` and make sure these lines exist in the file.
|
|
+
|
|
----
|
|
GRUB_DEFAULT=saved
|
|
GRUB_SAVEDEFAULT=false
|
|
----
|
|
|
|
. If you needed to change the content of the `/etc/default/grub`, apply the changes to `grub.cfg`.
|
|
+
|
|
----
|
|
# grub2-mkconfig -o /boot/grub2/grub.cfg
|
|
----
|
|
|
|
.Procedure
|
|
|
|
. List all possible menu entries.
|
|
+
|
|
----
|
|
# grep -P "^menuentry" /boot/grub2/grub.cfg | cut -d "'" -f2
|
|
----
|
|
|
|
. Select one of the displayed options and use it as an argument to set the default menu entry.
|
|
+
|
|
----
|
|
# grub2-set-default <menuentry>
|
|
----
|
|
|
|
. Verify the default menu entry
|
|
+
|
|
----
|
|
# grub2-editenv list
|
|
----
|
|
|
|
. 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].
|
|
|
|
|
|
.More information
|
|
|
|
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.
|
|
|
|
For example:
|
|
----
|
|
set default="5"
|
|
----
|
|
|
|
[NOTE]
|
|
====
|
|
If you edit the configuration file manually, the settings will be overwritten each time the `grub2-mkconfig` command runs.
|
|
====
|