I am currently in the process of configuring my Quadcopter with librepilot. Up until this point I have been using the software on Windows, but I have upgraded my laptop to a Linux Distribution (Ubuntu). When I tried to install the LibrePilot software using the linux commands given, I was given errors because several of the ppa links lead to 404's, which I checked in Firefox manually and they do not exist. I am unable to install Librepilot on this computer and therefore unable to configure my Quadcopter. Anyone have a solution?