How do I set GRUB2 as default?

How do I set GRUB2 as default?

1 Answer

  1. Open a terminal window and execute: sudo nano /boot/grub/grub.cfg.
  2. Enter your password.
  3. In the file opened, find the text: set default=”0″
  4. Number 0 is for the first option, number 1 for the second one, etc. Change the number for your choice.
  5. Save the file by pressing CTRL+O and exit by pressing CRTL+X .

How do I change the default grub entry?

Just follow these steps.

  1. Open file system.
  2. Open /etc folder.
  3. Open default folder.
  4. Find grub file and open it with leafpad (or any other text editor).
  5. Set GRUB_TIMEOUT to your need and save it.
  6. Now open terminal and type update-grub .
  7. Reboot your system.

How do I make GRUB2 default bootloader?

Installing GRUB2 on a BIOS system

  1. Create a configuration file for GRUB2. # grub2-mkconfig -o /boot/grub2/grub.cfg.
  2. List block devices available on the system. $ lsblk.
  3. Identify the primary hard disk.
  4. Install GRUB2 in the MBR of the primary hard disk.
  5. Reboot your computer to boot with the newly installed bootloader.

How do I find my grub default?

The default entry is determined by the GRUB_DEFAULT= setting in /etc/default/grub; the first “menuentry” has a value of “0”.

How do I change my default kernel to boot?

How to change the default kernel in GRUB for RHEL and CentOS

  1. Step 1: Get installed kernel versions.
  2. Step 2: Use grub2-set-default command.
  3. Step 3: Check grubenv file.
  4. Step 4: Rebuild Grub.cfg file.
  5. Step 5: Restart Server.

How do I change my default kernel?

Open /etc/default/grub with a text editor, and set GRUB_DEFAULT to the numeric entry value for the kernel you chose as the default. In this example, I choose the kernel 3.10. 0-327 as the default kernel. Finally, re-generate GRUB configuration.

Which file should you edit when using GRUB2 in order to set things like the timeout?

Edit /etc/default/grub This file contains a few interesting options you may want to change, including the default selected entry, the default timeout and additional options.

How do I make grub my default bootloader?

Use the F5/F6 key to make GRUB the default, if it’s not already the default. Follow that by pressing the F10 key, then Yes to the prompt to save and exit. Now whenever the computers boots, the GRUB boot manager will be the one you see.

How do I make Windows boot manager my default?

Press Win + R and type msconfig in the Run box. On the boot tab, select the desired entry in the list and click the button Set as default. Click the Apply and OK buttons and you are done.

How do I make dual boot my default boot?

Set Windows 7 as the Default OS on Dual Boot System Step-By-Step

  1. Click Windows Start button and type msconfig and Press Enter (or click it with the mouse)
  2. Click Boot Tab, Click Windows 7 (or whichever OS you want to set as default at boot) and Click Set as Default.
  3. Click either box to finish the process.

What is difference between grub and grub2?

GRUB and GRUB2 are two different versions. GRUB2 is considered as default boot loader of Ubuntu whereas GRUB is generally used in RHEL older versions. When started, GRUB2 mainly presents a menu and waits for some input from users. It generally transfers control to our operating system kernel.

What is boot grub2 grub cfg?

cfg file. The grub. cfg file is the GRUB configuration file. It is generated by the grub2-mkconfig program using a set of primary configuration files and the grub default file as a source for user configuration specifications. The /boot/grub2/grub.

How to set the DEFAULT entry for GRUB2 boot?

The default entry to boot is specified by the ‘default’ variable such as The ‘2’ here is to set the default entry to be the 2nd (start from 0) one. Update on Apr. 29, 2015: updated posts with support to both BIOS and UEFI based Linux systems; suggest the grub2-regen-cfg.bash script for re-generating grub2 config file.

How to set default saved_entry value for Grub_default?

grub uses ‘saved_entry’ entry from grubenv as default to boot, sniplet from /boot/grub2/grub.cfg: You can set the default choice by numerical value. You will set the default to the gentoo-5 entry. GRUB_DEFAULT is zero offset, so 3 will select the fourth entry as you wish.

What is the default default image for grub2-mkconfig?

But the image which will be booted by default will be the 4th image under the “Advanced options”. To make the vmlinuz-3.7.4-gentoo-5 as the default entry in the grub menu, the ordering of images should be such that the vmlinuz-3.7.4-gentoo-5 should be the first image when you run grub2-mkconfig.

How do I list all entries in GRUB2 config file?

List all the entries in the grub.cfg by: Select the default entry by the entry’s name. For example, the command to set the default entry to be ‘Fedora, with Xen hypervisor’ is as follows. Regenerate the Grub2 config file by:

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