[ubuntu-za] Untrusted sources

[Marius Kruger]

Hopefully not all those packages are from untrusted sources!
This happens easily if you added a ppa to your sources.list but never
imported it's key,
so normally you should rather add a ppa using something like 'sudo
add-apt-repository ppa:user/ppa-name' which does all the work for you.

I found a nice gui tool to manage PPAs and import their keys:
Y PPA Manager ( https://launchpad.net/y-ppa-manager )

You can install it by using this ppa:
https://launchpad.net/~webupd8team/+archive/y-ppa-manager?field.series_filter=oneiric