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I created a USB startup disk from ISO and booted using that to upgrade my 11.10 installation. But when I am not able to select Upgrade from Ubuntu 11.10 to Ubuntu 12.04. The radio button cannot be selected. I am doing a Network upgrade now.

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I can't. Hopefully someone else will find this useful. It might also help me figure out why I am having another problem with my installation. –  Sunil J Apr 27 '12 at 12:21

1 Answer 1

If are trying that upgrade with a "live USB" then you can't. Though if you have the alternate iso, then you could avoid wasting a CD by mounting the ISO as a drive with a command like:

sudo mkdir -p /media/cdrom
sudo mount -o loop ~/Desktop/ubuntu-11.10-alternate-i386.iso /media/cdrom

Then to start the upgrade enter:

gksu "sh /media/cdrom/cdromupgrade"
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