Dual boot windows 8 grub

Grub Customizer is an amazingly simple tool for this task. Also a movie buff with a soft corner for film noir. A graphic illustration of grub screen in Ubuntu-Windows dual boot setup.

Subscribe to our YouTube Channel for more Linux videos. Grub Customizer in Ubuntu Software Center. Start for Grub Customizer in application menu. When Windows Boot Manager is on the top, save it. Change the value in Boot default enter after from 10 to 3 or 4 seconds and then save the changes.

Like what you read? This is a concept known as dual-booting. Essentially, when you power up the system, you will be presented with a menu providing the option to boot either your RHEL 8 installation or Windows.

This installation method involves shrinking the size of the existing Windows partitions and then installing RHEL 8 into the reclaimed space. In order to accommodate RHEL on a disk drive that already contains a Windows installation, the first step involves shrinking the Windows partition to make some room.

The recommended course of action is to use the Windows Disk Management interface to reduce the size of the partition before attempting to install RHEL 8. Windows 10, right-click on the Start menu and select Disk Management from the resulting menu as highlighted in Figure Once loaded, the Disk Management tool will display a graphical representation of the disk drives detected on the system:. Right-click on the partition you wish to reduce in size and select Shrink Volume One-time boot to Ubuntu -- Most EFIs provide a built-in boot manager, accessed by hitting a function key, Esc, or Enter early in the system start process.

Chances are the ubuntu entry to boot Ubuntu will show up in this boot manager menu, enabling you to boot to Ubuntu. Alternatively, you could boot to an Ubuntu emergency medium, like the installer booted in "try before installing" mode. Either way, you can then use efibootmgr to adjust the boot order: Type sudo efibootmgr to see the boot entries.

Note the current BootOrder line. Locate the entry for ubuntu and note its Boot number. Type sudo efibootmgr -o xxxx[,yyyy,zzzz, What comes after that is most likely not very important, although I've noted that Windows seems to be likely to add itself back to the start of the boot order if it's not in the list. Thus, you should probably ensure that Windows is in the list, and it may be safest to re-order the list so that all the original entries are there, just with the ubuntu entry moved to the top of the list.

Firmware setup utility -- Some EFIs' setup utilities enable you to adjust the boot order. Details vary greatly from one EFI to another, so I won't go into specifics, but you could look for such an option in your setup utility. Rod Smith Rod Smith Afterwards the GRUB-bootmanager appears as it used to before the update, so I can confirm the provided solution worked for me.

I could not find the basic version of EasyUEFI but only a trial version of the non-free pro-version offered. This should be the accepted answer. If it is, move the boot disk priority above that of Windows Boot Manager. This ended up being the cleanest option for me. It's a few more key strokes, but hey, it works. If users are booting one OS much more than an assortment of others, this can be faster and safer over the long run.

This worked out for me too, after Windows 10 auto-updated itself. This solution worked for me when I deleted Ubuntu from windows It's very very easy to use graphical application, you do not need to use the command line, you only have to click a button : All the available repair options are described in the Ubuntu documentation and there is a separate page explaining how to start Boot-Repair by creating a bootable disk or installing it in an existing Ubuntu live disk and how to use it.

It would be nice if there were an easier way to get Boot Repair, though. It's faster to just set up a chroot repair than to Google around for some other tool to install.

Hope this helps. LovinBuntu LovinBuntu 3, 2 2 gold badges 18 18 silver badges 21 21 bronze badges. Go ahead and accept it. Find where your current OS is installed using sudo fdisk -l command. It will be labelled as Linux. Navigate that window using Tab key and select an option using Space key. If everything goes right, grub will be installed correctly. You can also do sudo grub-update for a double check.

I'm confused. But then it shouldn't even need to touch the MBR. Sorry my bad. I was using MBR and I really mean generic boot info. I've removed MBR from the description. Worked like a charm on Windows 10 to show the Grub menu again, allowing me back to Ubuntu I also found a more detailed guide here that shows how to revert if this does not work.

Hi Fred when I'm cooking forgetting dinner last night is a blessing. We deleted our previous comments. Only fsck command fixed the grub-rescue screen for me. Reboot when completed. The usual grub menu is nowhere on the scene.

It just kept booting into Windows 10 at each startup. I have faced both scenarios in my long journey with Linux and computers. I have also seen people panicking over it. Some users even think that their Linux partition was deleted and they lost their data. No need to panic here. Just calm down, take a deep breath and go into boot settings. The problem starts there and ends there. Read all the text carefully otherwise you may miss something important.

Also, the boot settings look different for different systems. The screenshots may look different. One of the reasons why a dual boot system boots automatically into Windows is because Windows boot manager has the priority in the boot order. You need to access the boot settings. Restart your system. The keys defer from manufacturer to manufacturer. You can cycle through theme one by one, quickly to avoid multiple booting. Some systems will show a boot menu with the possible boot options under the boot tab.

If you are lucky, it will show the boot options like this:. If you can see both Windows and Linux boot options and Windows boot is above Linux, you have to change the boot order. You should see the option to access boot settings. Access it.