There's also an os-prober script that checks the system's internal hard drives for other installed operating systems - Windows, other Linux distributions, Mac OS X, and so on - and automatically adds them to GRUB2's menu.Ĭhris Hoffman is the former Editor-in-Chief of How-To Geek. For example, on Ubuntu, there are scripts here that configure the default theme.

Scripts are also located in the /etc/grub.d/ directory. Edit this file to change GRUB2's settings. Your own GRUB settings are stored in the /etc/default/grub file.

It's automatically created by running the update-grub command as root - in other words, by running sudo update-grub on Ubuntu. However, you shouldn't edit this file by hand! This file is just for GRUB2's own usage. Instead, its main configuration file is the /boot/grub/grub.cfg file.

Related: GRUB2 101: How to Access and Use Your Linux Distribution's Boot Loader You may have customized the original GRUB's settings by editing its menu.lst file in the past, but the process is now different. We configured GRUB2 on Ubuntu 14.04 here, but the process should be similar for other Linux distributions.

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