tldr/pages/linux/grub-editenv.md

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# grub-editenv
> Edit GRUB environment variables.
> More information: <https://www.gnu.org/software/grub/manual/grub/grub.html>.
- Set a default boot entry (Assuming the boot entry already exists):
`grub-editenv /boot/grub/grubenv set default={{Ubuntu}}`
- Display the current value of the `timeout` variable:
`grub-editenv /boot/grub/grubenv list timeout`
- Reset the `saved_entry` variable to the default:
`grub-editenv /boot/grub/grubenv unset saved_entry`
- Append "quiet splash" to the kernel command line:
`grub-editenv /boot/grub/grubenv list kernel_cmdline`