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grub2
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configuration
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URL:
https://askubuntu.com/q/1160778
Title:
Grub file can't be saved after modification
ID:
/2019/07/24/Grub-file-can_t-be-saved-after-modification
Created:
July 24, 2019
Edited: August 24, 2019
Upload:
September 15, 2024
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grub is a system owned application so you need to use sudo to edit the file:
sudo -H gedit /etc/default/grub
If you omit sudo -H you can view the file but not save any changes.
After editing the file you need to run:
sudo update-grub
This will compile the changes you made to /etc/default/grub and compile them with grub functions to create a new /boot/grub/grub.cfg which is the actual file parsed at boot time.
Note: Related question today: How do I edit configuration files?