[ubuntu-us-mi] Updating isos without downloading the whole image

Robert Citek robert.citek at gmail.com
Thu Mar 25 21:27:25 GMT 2010

On Tue, Mar 23, 2010 at 5:21 PM, Daniel <prodigiouspenguin at gmail.com> wrote:
> Here's an article about using zsync to update an iso:
> http://ubuntu-tutorials.com/2009/10/29/use-zsync-to-update-existing-iso-images/
> It's for Karmic but I imagine you could just change the URLs to reflect
> Lucid.

Thanks.  Changed the URL and automated the process:

touch -r MD5SUMS MD5SUMS.ts
wget -Nc http://cdimage.ubuntu.com/daily-live/current/MD5SUMS
[ MD5SUMS -nt MD5SUMS.ts ] &&
grep -o lucid.*iso$ MD5SUMS | while read iso ; do
  zsync http://cdimage.ubuntu.com/daily-live/current/${iso}.zsync &
rm MD5SUMS.ts

- Robert

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