terminal command to add medibuntu lucid repository error

[wdavro]

I'm using 10.04 Lucid 64 bit

on the page: https://help.ubuntu.com/community/Medibuntu

the terminal command to load the repository:
sudo wget --output-document=/etc/apt/sources.list.d/medibuntu.list http://www.medibuntu.org/sources.list.d/$(lsb_release -cs).list && sudo apt-get --quiet update && sudo apt-get --yes --quiet --allow-unauthenticated install medibuntu-keyring && sudo apt-get --quiet update

generates the following error:
Err http://us.archive.ubuntu.com lucid Release.gpg
  Something wicked happened resolving 'us.archive.ubuntu.com:http' (-5 - No address associated with hostname)

Then later follows the error:
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/Release.gpg Something wicked happened resolving 'us.archive.ubuntu.com:http' (-5 - No address associated with hostname)

E: Some index files failed to download, they have been ignored, or old ones used instead.

[Gauvain Pocentek (gpocentek)]

This doesn't seem to be a problem related to medibuntu.
You have a problem with the Ubuntu repositories. Try to run 'sudo apt-get update', it might have been temporary.