I can not change anything, only by starting "software-properties-gtk" with gksudo (@ xubuntu 14.04 64Bit). error message: "ERROR:root:Authentication canceled, changes have not been saved"
I can not change anything, only by starting "software- properties- gtk" with gksudo (@ xubuntu 14.04 64Bit). root:Authentica tion canceled, changes have not been saved"
error message: "ERROR: