Intro

zsync is a usefull progam for download the parts of a file that are changed on the server, so you haven't to download everytime a full copy of Ubuntu but simply update it.

Installing zsync

Install [apt://zsync zsync] package.

Obtain Ubuntu

All Ubuntu's CD images are stored on the http://cdimage.ubuntu.com site. The first time download fastest way is by [http://en.wikipedia.org/wiki/BitTorrent_(software): Torrent].

Update ISO

To update your ISO image, open a Terminal, go to the directory whee you have saved the image and copy/paste the appropriate from the following commands.

Computer with 32 bit (i386) architecture.

UBUNTU

zsync http://cdimage.ubuntu.com/daily-live/current/lucid-desktop-i386.iso.zsync

KUBUNTU

zsync http://cdimage.ubuntu.com/kubuntu/daily-live/current/lucid-desktop-i386.iso.zsync

XUBUNTU

zsync http://cdimage.ubuntu.com/xubuntu/daily-live/current/lucid-desktop-i386.iso.zsync

Computer with 64 bit (amd64 or multicore) architecture.

UBUNTU

zsync http://cdimage.ubuntu.com/daily-live/current/lucid-desktop-amd64.iso.zsync

KUBUNTU

zsync http://cdimage.ubuntu.com/kubuntu/daily-live/current/lucid-desktop-amd64.iso.zsync

XUBUNTU

zsync http://cdimage.ubuntu.com/xubuntu/daily-live/current/lucid-desktop-amd64.iso.zsync