daniel@owncloud:/etc/apt$ cd apt.conf.d/
daniel@owncloud:/etc/apt/apt.conf.d$ ls
00aptitude      00trustcdrom  01autoremove-kernels  15update-stamp  20auto-upgrades  50unattended-upgrades  99update-notifier
00CDMountPoint  01autoremove  10periodic            20archive       20changelog      70debconf
daniel@owncloud:/etc/apt/apt.conf.d$ cat 50unattended-upgrades
// Automatically upgrade packages from these origin patterns
Unattended-Upgrade::Origins-Pattern {

};

// List of packages to not update
Unattended-Upgrade::Package-Blacklist {
        "puppet";
        "puppet-common";
        "puppetlabs-release";
        "facter";
        "owncloud";
        "owncloud-config-apache";
        "owncloud-server";
};

// This option allows you to control if on a unclean dpkg exit
// unattended-upgrades will automatically run
//   dpkg --force-confold --configure -a
// The default is true, to ensure updates keep getting installed
Unattended-Upgrade::AutoFixInterruptedDpkg "true";

// Split the upgrade into the smallest possible chunks so that
// they can be interrupted with SIGUSR1. This makes the upgrade
// a bit slower but it has the benefit that shutdown while a upgrade
// is running is possible (with a small delay)
Unattended-Upgrade::MinimalSteps "true";

// Install all unattended-upgrades when the machine is shuting down
// instead of doing it in the background while the machine is running
// This will (obviously) make shutdown slower
Unattended-Upgrade::InstallOnShutdown "false";

// Send email to this address for problems or packages upgrades
// If empty or unset then no email is sent, make sure that you
// have a working mail setup on your system. A package that provides
// 'mailx' must be installed.
Unattended-Upgrade::Mail "";

// Set this value to "true" to get emails only on errors. Default
// is to always send a mail if Unattended-Upgrade::Mail is set
Unattended-Upgrade::MailOnlyOnError "false";

// Do automatic removal of new unused dependencies after the upgrade
// (equivalent to apt-get autoremove)
Unattended-Upgrade::Remove-Unused-Dependencies "true";

// Automatically reboot *WITHOUT CONFIRMATION* if a
// the file /var/run/reboot-required is found after the upgrade
Unattended-Upgrade::Automatic-Reboot "false";


// Use apt bandwidth limit feature, this example limits the download
// speed to 70kb/sec
//Acquire::http::Dl-Limit "70";