How to change the default boot item in Grub?

How to change the default boot item in Grub?

The configuration change we made allows the grub-set-default and grub-reboot commands to be used at any time. These allow you to change the default boot item permanently or only for the next boot, respectively. Run grub-set-default or grub-reboot (with sudo) with the number of the menu item to boot (the first item is 0).

Is it possible to reboot into a different OS with Grub?

GRUB contains the ability to reboot into a specified OS once. This is useful for people who DualBoot.

How to set Grub timeout to be indefinite?

The very next couple lines tell you that you can read the full documentation of options in that file (again, /etc/default/grub) by typing info -f grub -n ‘Simple configuration’. That said, set GRUB_TIMEOUT to -1 if you want to set the “grub time” to be indefinite. In other words, it will never automatically boot.

Is there way to reorder grub menu entries?

You can use an easy-to-use the GUI application called Grub Customizer to make your life a little bit easier. As the name suggests, you can do much more than just reordering GRUB menu entries with it. (See Ask Ubuntu question Are PPA’s safe to add to my system and what are some “red flags” to watch out for? .)

How to change timeout in Linux Grub boot loader?

If you want to change back to a hidden menu at some later stage you can uncomment it by removing the # character. The “timeout” option specifies how long in seconds the hidden menu or regular menu list should wait before automatically booting into the default option. On Fedora 8 the default is 5 seconds.

How to disable automatic boot in Linux Grub?

To disable the automatic boot option, “comment” out the line as per the hiddenmenu option above: You can then re-enable it later by removing the # symbol. The final thing you might want to do is to change the operating system that is selected by default.

Where do I change the menu entries in Grub?

If you need more fine-grained control, or want to remove entries that are not kernel versions, you must change the files located in /etc/grub.d. /etc/grub.d contains files that hold the menu entries that used to be contained in /boot/grub/menu.lst.

Which is the first boot entry in Grub?

GRUB stands for GNU GRand Unified Bootloader. It is responsible for loading your operating system from your hard disk to your main memory. By default GRUB comes with the default boot entry which is the first boot entry. You can also modify this behavior of grub and change grub boot order.

Where does Grub go in changeefaultos in Ubuntu?

Windows, Fedora, whatever) above the “Automagic kernels” comment, thus making any of Ubuntu’s automatic changes take place below the prefered entry, meaning it is always at the top so is always entry 0. Also, I know there are GRUB lines which can be added which make the last selected OS the default, but I have forgotten them

Is there a way to hide the GRUB menu?

You can even hide the grub menu from user and only show it when specific key is pressed. To change GRUB boot order, you need to make some modifications to the GRUB configuration file located at /etc/default/grub.