“Boot Error” with live usb of Ubuntu 15.10 – How to Fix It

Ubuntu live usb boot error

I just created a bootable Ubuntu usb drive using Unetbootin, and found that it does not boot properly. On bootup it shows the following error.

SYSLINUX 6.03 EDD 20150813 Copyright (C) 1994-2012 H. Peter Anvin et al
Boot Error

The problem is with the way, the iso is written to the usb drive by tools like Unetbootin. To fix this, the iso has to be written directly to the drive. There are 2 ways to do this -

Method 1. Write the iso to usb using dd command

Use the lsblk command to find the usb device name.

$ lsblk -d
sda    8:0    0 111.8G  0 disk 
sdb    8:16   0 465.8G  0 disk 
sdc    8:32   1  15.1G  0 disk 
sr0   11:0    1  1024M  0 rom

Its sdc here, so the device path would be /dev/sdc

Now run the dd command to write the iso file to the usb drive.

$ sudo dd if=ubuntu-15.10-desktop-amd64.iso of=/dev/sdc bs=1M

Now the usb should boot fine.

Method 2 - Use Gnome Disks

The other alternative method is to write the iso file to the usb drive using the "Gnome Disks" utility program. Its free and available in the Ubuntu repositories.

$ sudo apt-get install gnome-disk-utility

Now run it from the Applications menu of your desktop or from the command line with the following command

$ gnome-disks

Click the Menu icon on the top left and click "Restore Disk Image". Select the Ubuntu iso disk image and write it. Now the usb should boot fine.

Last Updated On : 6th May 2016

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