auto upgrade packages on ubuntu

There are such a huge number of upgrades all the time for my Ubuntu droplets, system as well as app upgrades. I am sick of manually upgrading every week, is there an easy way to have the system perform these upgrades by itself, perhaps on a weekly schedule and with an email notification to me when completed? I am assuming I could write a bash script and run it in cron, but was wondering if there was some easier mechanism built into linux.

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The unattended-upgrades package in Ubuntu will allow you to set this up and select whether you want all packages to update or for the system only to install security updates.

sudo apt-get install unattended-upgrades
sudo dpkg-reconfigure unattended-upgrades