Work fine for me,
Executing: /tmp/apt-key-gpghome.vwHceuQVhn/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys B5B116B72D0F61F0
key B5B116B72D0F61F0:
1 signature not checked due to a missing key
gpg: key B5B116B72D0F61F0: public key “Launchpad PPA for Tony George” imported
gpg: Total number processed: 1
gpg: imported: 1
Can be a DNS error https://bbs.archlinux.org/viewtopic.php?id=220996 which ones are you using?
Try ping -c 1 keyserver.ubuntu.com if it doesn’t work try changing your DNS through resolv.conf
Anyway you can use DejaDup to backup your machine, it’s the default Gnome Desktop app to do that.