#GRUB DISPLAY MENU HOW TO#
#GRUB DISPLAY MENU ZIP FILE#
#GRUB DISPLAY MENU UPDATE#
#GRUB DISPLAY MENU SERIES#

Open it up, as root, in your favourite text editor. The configuration file will be located at either /boot/grub/menu.lst or /etc/nf. A word of warning, though, editing the GRUB configuration file without knowing what you're doing can result in bad things happening and can cause you to not be able to boot your system. Thankfully, there's an easy way to change it if you go into your GRUB configuration file.

Gpt(x) where (x) = partition number identified in Step 2.įinally run the below command to update your grub config, and then reboot your system.Īssuming the above steps were successfully performed, the grub bootloader menu should now appear, and display MemTest86 as an option.That boring white on black GRUB boot menu you get when you switch on your computer is a bit, well, boring, isn't it? Hd(x) where (x) = disk number identified in Step 2. Open the file in a text editor (with sudo privileges) and add the following text:īased on your specific environment, edit this line as follows: This file is a template that you can use to create additional entries to be added to the boot menu. In our case we will be editing the 40_custom file. Below are the contents of the directory on a fresh Ubuntu installation. Navigate to the grub config file directory. Modify the Grub config to add a MemTest86 boot option: Then list the root using 'ls (hd#,gpt#)/', for each drive until you find the EFI boot partition. The drive/partitions are all listed as (hd#,gpt#), regardless of what they are physically. Then 'ls' to get a list of all the drives. Type 'c' on the grub menu to get a command line. Instead you will need follow the below to get the correct disk and partition: If your EFI boot partition is on a NVMe drive, the above step will not display the correct partition. Now, copy the locally created /EFI/BOOT directory to your system’s EFI boot directory using the following command: Where y corresponds to the partition number. Take note of this directory as it directly corresponds to the disk number, and boot partition the EFI file system is on, this information will be needed in subsequent steps. On this particular system, the EFI boot partition (/boot/efi) is stored under /dev/sda1. This can be performed by running the df command, and observing the output: In order to perform this, you must first locate and confirm the EFI boot drive partition for your local system. Copy the boot image from the temporary drive to the system EFI partition: Next, mount the image file to the temporary directory chosen earlier, by calculating the correct mount offset (obtained by multiplying the start – 514048 by 512, the size of each sector, resulting in 263192576):Ģ.

As such, we need extract this file and mount it to a temporary location/folder, using the below series of commands.Ĭreate a temporary directory using the following command: In the screenshot above, the file that needs to be mounted is the ‘memtest86-usb.img2’ file, which contains the EFI boot image. Unzip it within its current directory, and then use the built-in fdisk utility to analyse its contents and determine the correct mount point:

Create a boot image from the MemTest86 zip file:ĭownload the MemTest86 zip file available from the PassMark website.

Update the grub configuration by running the command below:ġ.

Change the following two lines and save, close the file:.

Open the file /etc/default/grub with a text editor, you will see the following contents:.

As such, the first step will likely require forcing Grub to permanently display it’s menu, by performing the following steps: On some Linux distributions such as Ubuntu 20.04 LTS, the Grub boot menu is hidden by default, and ‘skipped’ during the boot process.

Pre-requisite: enabling Grub menu during boot: Note: a UEFI system and the 64-bit version of MemTest86 are required in this guide. different Linux distros, older Grub versions etc.) The guide assumes that the user is familiar with Linux operating systems and terminal commands. Please note that the same steps will likely work with other Linux distributions, however this is the only configuration we’ve tested, and thus cannot guarantee compatibility or provide support for other configurations (e.g.

The following guide provides users with step-by-step instructions on how to configure and use Memtest86 圆4 with Grub v2.04 running under Ubuntu 20.04 LTS 64-bit. In our instance, Grub can be used to chainload our popular MemTest86 software, directly from a local boot disk/partition on the system. Grub is a popular boot loader that many popular Linux distributions come pre-packaged with, such as Ubuntu LTS. Some of our customers have been asking whether Memtest86 can be used in conjunction with Grub.

#GRUB DISPLAY MENU UPDATE#

#GRUB DISPLAY MENU SERIES#

#GRUB DISPLAY MENU ZIP FILE#

#GRUB DISPLAY MENU HOW TO#

Grub display menu