Something wicked happened resolving

Looks like the medibuntu folks have called it quits on their repository.

Anyone who still has medibuntu in their Linux repos should remove it. If they don’t, they’ll see error messages similar to this when they perform their periodic sudo apt-get update command:

Something wicked happened resolving '' (-5 - No address associated with hostname)

or precise Release: The following signatures were invalid: NODATA 1 NODATA 2

Some Google searches imply this is a DNS issue when in fact, medibuntu has gone offline.

The simple fix is to remove medibuntu from your repository. There’s a single command that can do this for you:

sudo sed -i '/^deb http:\/\/*/d' /etc/apt/sources.list /etc/apt/sources.list.d/*.list

Thanks to this forum thread for the details.