How to upgrade Ubuntu using [COLOR="Red"]alternate CD[/COLOR] :
1- Download alternate CD image .
_Direct link :_ [[COLOR="red"]AMD64[/COLOR]]("http://releases.ubuntu.com/karmic/ubuntu-9.10-alternate-amd64.iso") [[COLOR="Red"]i386[/COLOR]]("http://releases.ubuntu.com/karmic/ubuntu-9.10-alternate-i386.iso")
_Torrent:_ [[COLOR="Red"]AMD64[/COLOR]]("http://releases.ubuntu.com/karmic/ubuntu-9.10-alternate-amd64.iso.torrent") [[COLOR="red"]i386[/COLOR]]("http://releases.ubuntu.com/karmic/ubuntu-9.10-alternate-i386.iso.torrent")
2- Run this command to mount the image.
sudo mount -o loop **[COLOR="red"]PATH[/COLOR]**/ubuntu-9.10-alternate-i386.iso /media/cdrom0
change [COLOR="Red"]PATH[/COLOR] to your CD image path.
3- Run update manager from CD.
gksu "sh /cdrom/cdromupgrade"
4- Enjoy upgrading.