Download the alternate installation CD from http://releases.ubuntu.com/oneiric/
Burn the ISO to a CD and insert it into the CD-ROM drive.
If the ISO file is on the computer to be upgraded, 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
A dialog will be displayed offering upgrade using that CD then follow the on-screen instructions.
If the upgrade dialog is not displayed, run the following command using Alt+F2:
gksu "sh /media/cdrom/cdromupgrade"
Or in Kubuntu
kdesudo "sh /media/cdrom/cdromupgrade"
Burn the ISO to a CD and insert it into the CD-ROM drive.
If the ISO file is on the computer to be upgraded, 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
A dialog will be displayed offering upgrade using that CD then follow the on-screen instructions.
If the upgrade dialog is not displayed, run the following command using Alt+F2:
gksu "sh /media/cdrom/cdromupgrade"
Or in Kubuntu
kdesudo "sh /media/cdrom/cdromupgrade"
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