Don't worry! It's only stuff...

# sudo apt-get install unattended-upgrades update-notifier-common
 
uncoment // "Ubuntu karmic-updates";
sed -i '4s|//|  |g' /etc/apt/apt.conf.d/50unattended-upgrades
 
uncoment //Unattended-Upgrade::Mail "root@localhost";
sed -i 's|//Unattended-Upgrade::Mail|Unattended-Upgrade::Mail|g' /etc/apt/apt.conf.d/50unattended-upgrades
 
 
sed -i 's|APT::Periodic::Download-Upgradeable-Packages "0";|APT::Periodic::Download-Upgradeable-Packages "1";|g' /etc/apt/apt.conf.d/10periodic
sed -i 's|APT::Periodic::AutocleanInterval "0";|APT::Periodic::AutocleanInterval "1";|g' /etc/apt/apt.conf.d/10periodic
echo 'APT::Periodic::Unattended-Upgrade "1";' >> /etc/apt/apt.conf.d/10periodic
 
 
 
## test
apt-get install cron-apt
 
edit /etc/cron-apt/config
   MAILTO="root"
   MAILON="upgrade"
 
cp /usr/share/doc/cron-apt/examples/9-notify /etc/cron-apt/action.d/
 
 
 
##sudo dpkg-reconfigure -plow unattended-upgrades
# /etc/apt/apt.conf.d/20auto-upgrades
 
 
# Links
http://www.vanutsteen.nl/2008/06/09/unattended-upgrades-on-a-ubuntu-hardy-server/