caarnio@C720P:~$ sudo apt-get install gnome-keyring gconf
[sudo] password for caarnio: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package gconf is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'gconf' has no installation candidate