Contents
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”.
Resolution
- Place your SLES/SLED 10 CD 1 or DVD in the drive and boot up to the CD or DVD.
- Enter the command “fdisk -l”.
- Enter the command “mount /dev/sda2 /mnt”.
- Enter the command “grub-install –root-directory=/mnt /dev/sda”.
- Once this command completes successfully reboot your system by entering the command “reboot”.
How do I access bootloader?
Accessing the Bootloader Directly from the Device Hit the power button to execute the selected command: Nexus, LG, and Motorola Devices: Use the volume buttons till you see the “Recovery mode” option, then hit power. HTC Devices: Select “HBOOT” first, which will open a new menu where you’ll select “recovery.”
How do I boot into bootloader Samsung?
Samsung Devices: Samsung devices don’t have a traditional bootloader, but something the company calls “Download mode.” To access it, press and hold the volume down, power, and home buttons until the Samsung logo shows up, then release. Be warned, however, it’s basically useless without a computer.
If GRUB_TIMEOUT_STYLE is set to countdown or hidden, the timeout is instead counted before the menu is displayed. If this option is unset or set to menu, then GRUB will display the menu and then wait for the timeout set by GRUB_TIMEOUT to expire before booting the default entry.
What happens when you boot the GRUB2 menu?
If a hotkey associated with a menu entry is pressed, it will boot the associated menu entry immediately. If the timeout expires before either of these happens, it will boot the default entry. In the countdown case, it will show a one-line indication of the remaining time.
GRUB_HIDDEN_TIMEOUT controls whether or not the menu is shown. The default behavior is to hide the menu if only one operating system is present. If a user with only Ubuntu wishes to display the menu, place a # symbol at the start of this line to disable the hidden menu feature.
Do you run GRUB2 mkconfig after each edit?
You state that you run grub2-mkconfig after each edit. However, if you look at the man-page, you will notice As you can see, grub2-mkconfig (recently simply grub-mkconfig) doesn’t write the actual configuration file, it only prints the contents to the console.