Automatic Security Updates

# Install package unattended-upgrades
sudo apt install unattended-upgrades

# Edit config file
sudo nano /etc/apt/apt.conf.d/10periodic

# Add the following to file 10periodic
APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Download-Upgradeable-Packages "1";
APT::Periodic::AutocleanInterval "7";
APT::Periodic::Unattended-Upgade "1";

# (Optional) Edit config file for other types of updates
sudo nano /etc/apt/apt.conf.d/50unattended-upgrades

# Enable unattended-upgrades
sudo dpkg-reconfigure --priority=low unattended-upgrades