Repositories problem

After install 14RC there is problem with repositiories. In Muon after check for new packages it said:
404  Not Found
404  Not Found
404  Not Found
404  Not Found

how to fix it?

Change those PPA lines like this:


Thank you, now all works again.

I’m suffering from the same problem for some of the updates as well. What file am I supposed to edit?

The file you would need to edit manually is /etc/apt/sources.list. You should also be able to edit these lines using software sources in synaptic or from within Muon.