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

[Daniel]

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.

[Robert Citek]

Post by Daniel
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 &
done
rm MD5SUMS.ts

Regards,
- Robert

[Robert Citek]

Apparently, the -c is incompatible with the -N option in wget. The
wget line should read this:

wget -N http://cdimage.ubuntu.com/daily-live/current/MD5SUMS

Regards,
- Robert

Post by Robert Citek
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 &
done
rm MD5SUMS.ts