【solved】How to update grub in ubuntu

How do I edit a grub file in Ubuntu?

Open the file with gksudo gedit /etc/default/grub (graphical interface) or sudo nano /etc/default/grub (command-line). Any other plaintext editor (Vim, Emacs, Kate, Leafpad) is fine too. Find the line that starts with GRUB_CMDLINE_LINUX_DEFAULT and add reboot=bios to the end.

How do I update grub Arch?

Updating GRUB packages Run the command of Arch Linux to sync, update and refresh the system packages through Pacman. To manually check the latest version of GRUB available in the repository, input the following command. Pacman, in this command, will reinstall the latest version of GRUB for your server.

Should I update grub?

Why would you need to update grub? There could be a number of scenarios when you need to update grub. Suppose you changed the grub config file (/etc/default/grub) to change the default boot order or reduce the default boot time. Your changes won’t take into effect unless you update the grub.

How do I upgrade to grub2?

1 Answer

  1. Create file /etc/apt/apt.conf.d/default-release with this content. APT::Default-Release “stretch”; Choose either “stretch” or “oldstable” as default release name.
  2. Install or upgrade grub2 with sudo apt -t buster install grub2.

How do I regenerate GRUB config?

Rebuild the grub.cfg file by running the grub2-mkconfig -o command as follows:

  1. On BIOS-based machines, issue the following command as root : ~]# grub2-mkconfig -o /boot/grub2/grub.cfg.
  2. On UEFI-based machines, issue the following command as root : ~]# grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg.

What is the 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.

Where is the grub file located?

The GRUB menu interface configuration file is /boot/grub/grub. conf. The commands to set the global preferences for the menu interface are placed at the top of the file, followed by stanzas for each operating kernel or operating system listed in the menu.

Should I use grub or Windows bootloader?

Depends, both work well, use the one you feel most comfortable with. If you want support from the Linux / Ubuntu community , use grub. If you use the windows boot loader, your support will be either Microsoft or the Windows community.

Is rEFInd better than grub?

Because rEFInd’s configuration files are simpler, it tends to be easier to fix and tweak its configuration. rEFInd has more eye candy, as you point out. rEFInd is more reliable at booting Windows with Secure Boot active. rEFInd can launch BIOS-mode boot loaders; GRUB can’t.

How do I make grub my default boot manager?

Once installed, search for Grub Customizer in the menu and open it.

  1. Start Grub Customizer.
  2. Select Windows Boot Manager and move it to the top.
  3. Once Windows is on the top, save your changes.
  4. Now you’ll boot into Windows by default.
  5. Reduce the default boot time in Grub.

How do I enable grub in BIOS?

With BIOS, quickly press and hold the Shift key, which will bring up the GNU GRUB menu. (If you see the Ubuntu logo, you’ve missed the point where you can enter the GRUB menu.) With UEFI press (perhaps several times) the Escape key to get grub menu. Select the line which starts with “Advanced options”.

How do I manually install grub?

1 Answer

  1. Boot the machine using a Live CD.
  2. Open a terminal.
  3. Find out the name of the internal disk by using fdisk to look up the device’s size.
  4. Install GRUB boot loader onto the proper disk (the example below assumes it is /dev/sda ): sudo grubinstall –recheck –no-floppy –root-directory=/ /dev/sda.

Is Grub needed with UEFI?

Unless you plan to dual boot with alternate operating systems (such as Windows), GRUB isn’t mandatory if you’re on a pure UEFI stack. Alternate boot managers such as systemd-boot and even EFISTUB are sufficient for your needs.

How do I remove GRUB bootloader?

Remove GRUB bootloader from Windows

  1. Step 1(optional): Use diskpart to clean disk. Format your Linux partition using Windows disk management tool.
  2. Step 2: Run Administrator Command Prompt.
  3. Step 3: Fix MBR bootsector from Windows 10.

Type in the following command, then hit Enter. sudo pluma /etc/default/grub 3. Find the Grub timeout line and set is as follows: GRUB_TIMEOUT=0 4. Save and close your file.

How do I get rid of grub Arch?

You cannot ‘uninstallgrub. You can overwrite it by Windows bootloader. I’m afraid that most people who know how to reinstall Windows bootloader without reinstalling Windows are on superuser (I guess for most people here Windows is the second system) – you have to do it from Windows install disk or similar tools.

How do I remove grub after installing rEFInd?

To delete that, you’ll need to type sudo rm -rf /boot/efi/EFI/ubuntu . Ubuntu is likely to try to add GRUB back. To deal with this issue, I personally employ an empty “dummy” package that claims to be GRUB 3. You can download it from here, if you care to use it.

How do I change from grub to rEFInd?

Re: [SOLVED]How to Uninstall GRUB and Install reFInd? The grub package as managed by pacman does not track the files created by grub-install GRUB#Installation_2 /boot/grub and $ESP/EFI/GRUB/ would need to be removed manually. Yes then afterwards you would use efibootmgr to remove the EFI boot entry.