zen@zen-laptop:~$ sudo apt-get upgrade
[sudo] password for zen:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
  libsyncdaemon-1.0-1 linux-generic linux-headers-generic linux-image-generic
  python-ubuntuone-client ubuntuone-client ubuntuone-client-gnome
0 upgraded, 0 newly installed, 0 to remove and 7 not upgraded.