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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
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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).

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