I'm a beginer and installed ubuntu 14.04 alongside windows 7 but grub doesn't come up, it goes straight to windows.
I booted the live cd, in terminal typed sudo fdisk -l and this is what I got

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x8de9b533

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1   976773167   488386583+  ee  GPT
Partition 1 does not start on physical sector boundary.

Disk /dev/sdb: 7747 MB, 7747397632 bytes
32 heads, 63 sectors/track, 7505 cylinders, total 15131636 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0a2a74d7

What can I do?

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *          63    15130079     7565008+   b  W95 FAT32
  • Well, like the output of fdisk says, you shouldn't use that because you are using a GPT-style partition table. This means you are probably using a UEFI (not BIOS) machine to boot from. Please include the output of the following commands instead: sudo efibootmgr, sudo parted -l – gertvdijk May 9 '15 at 11:33
  • I did it but says sudo: efibootmgr: command not found – Isaac Cazallas May 9 '15 at 11:54
  • @Ron again, if you edit posts please fix all errors not just one. – Pabi May 9 '15 at 13:46

You may be able to fix this problem using the boot-repair utility. Boot your live CD in EFI mode, open a terminal, and enter these three commands, in order:

sudo apt-add-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install boot-repair

Then, launch Boot Repair from the Unity Dash and it will fix your problem (hopefully).

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.