I am new to Ubuntu,i managed to install it on my PC (with windows 10). At the end of installation it asked me to restart but after that my computer directly booted in windows, even i am not able to see the DRIVE where ubuntu is installed in windows
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my pc is older one and when i type Confirm-SecureBootUEFI it shows Cmdlet not supported on this platform – Shubham Gupta Oct 06 '15 at 07:40
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i have earlier installed backbox (Linux distribution based on Ubuntu) which was working fine – Shubham Gupta Oct 06 '15 at 07:43
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First you have to boot into Windows and disable hibernation and Fast Boot from within there.
To disable hibernation open command prompt as administrator and execute this command:
powercfg /h off
To disable Fast Boot open Control Panel go to Energy Settings, enable show hidden settings and uncheck Fast Boot. After these steps shutdown the machine (do NOT reboot) completely.
Then try to change the boot order in BIOS (UEFI) settings.
Select Ubuntu to be the default operating system to boot.
In case your computer has a legacy BIOS instead of an UEFI based,
(Fast Boot might not be an option)
reinstall the GRUB boot loader.
Boot from ubuntu install media, open a terminal and execute:
sudo mount /dev/sd** /mnt
sudo grub-install --boot-directory=/mnt/boot /dev/sd*
Note : sd* = disk | sd** = system partition
If you do not know the partition numbers you can easily identify them with GParted.
This (Graphic User Interface) tool is already included in the Ubuntu installation media.
cl-netbox
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how can i know which is my system partition and which is disk. name for my whole harddisk is sda2 and parition where ubuntu is installed is sda11 – Shubham Gupta Oct 06 '15 at 09:23
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@ShubhamGupta : the whole disk is sda - system partition is sda11 - if you are not sure please make a screenshot from gparted output, load it up somewhere and provide me with the link. :) – cl-netbox Oct 06 '15 at 09:47
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here it is http://s9.postimg.org/u7lgqd2kf/Screenshot_from_2015_10_06_10_40_58.png – Shubham Gupta Oct 06 '15 at 10:54
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@ShubhamGupta : It looks like you installed ubuntu twice. I suggest : delete partition 11 (except if you placed something else in there) then execute the commands from ubuntu install media using sda ( * ) and sda9 ( ** ) - post back results ... Good luck ! :) – cl-netbox Oct 06 '15 at 11:00