(EN) Steven Vaughan-Nichols, Free software father declared Ubuntu Linux to contain spyware, su zdnet.com, ZDNet, 9 dicembre 2012. URL consultato il 19 febbraio 2013 (archiviato il 10 febbraio 2013).
«Richard M. Stallman, aka RMS, creator of the Gnu General Public License (GPL) and the Free Software Foundation has announced that as far as he's concerned, Ubuntu contains spyware and that Linux supporters should shun Ubuntu for spying.»