The steps described in this article are useful for other Debian-based Linux distributions, including Ubuntu. Rebooting without pressing F12 always reboots in command line mode.This tutorial explains how to change the grub boot order in Debian from the command line in a few easy steps. Using this technique, it always loads the menu. What works is to reboot using Ctrl+Alt+Del, then pressing F12 repeatedly until the normal GRUB menu appears. There is probably a command that I can type to boot from that prompt, but I don't know it. Move the cursor to the end of the line.Move the cursor down to find the kernel command line.Start the system and, on the GRUB 2 boot screen, move the cursor to the menu entry you want to edit, and press the e key for edit.To change kernel parameters only during a single boot process, proceed as follows: The update-grub will make the permanent changes to your grub. To edit grub, make your changes to /etc/default/grub. On the next page, select the OS you want to set as the default boot entry.On the next page, click Choose a default operating system.In the boot loader menu, click the link Change defaults or choose other options at the bottom of the screen.

chainloader: Chain-load another boot loader.Ĭhange Default OS In Boot Menu Using Startup Options.blocklist: Get the block list notation of a file.If you forget a command, you can run the command help (see help). Find the line starting with '#GRUB_THEME' and change it to 'GRUB_THEME=/boot/grub/themes//' (replace is probably OK remove '' brackets) Extract the theme to /boot/grub/themes/.There are multiple files for configuring the menu - /etc/default/grub mentioned above, and all the files in the /etc/grub. The primary configuration file for changing menu display settings is called grub and by default is located in the /etc/default folder. Start grub-customizer and choose your theme.