sudo apt-key update
gpg: keyblock resource `/etc/apt/trusted.gpg.d/yorba-daily-builds.gpg': resource limit
gpg: keyblock resource `/etc/apt/trusted.gpg.d/yorba-ppa.gpg': resource limit
gpg: keyblock resource `/etc/apt/trusted.gpg.d/zedtux-rhythmbox-folderview.gpg': resource limit
gpg: key 437D05B5: "Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>" not changed
gpg: key FBB75451: "Ubuntu CD Image Automatic Signing Key <cdimage@ubuntu.com>" not changed
gpg: key C0B21F32: "Ubuntu Archive Automatic Signing Key (2012) <ftpmaster@ubuntu.com>" not changed
gpg: key EFE21092: "Ubuntu CD Image Automatic Signing Key (2012) <cdimage@ubuntu.com>" not changed
gpg: Total number processed: 4
gpg:              unchanged: 4