Canonical just released Ubuntu 16.04.1, the first point release in the Ubuntu 16.04 “Xenial Xerus” series. All the changes made to Ubuntu 16.04 have been combined into a new installer image, which you can now download.
What’s a point release?
If you’re already using Ubuntu 16.04, you don’t need to do anything special to upgrade to Ubuntu 16.04.1. Just install the updates available in the Update Manager application and your system will be upgraded to the latest software.
Point releases like this one are primarily useful for new installs. They bundle together the latest security updates, bug fixes, and other improvements. If you have an Ubuntu 16.04 LTS live CD or live USB drive you use, you’ll want to replace it with Ubuntu 16.04.1 to ensure you have the latest security updates.Some point releases include new “hardware enablement stacks”—new versions of the Linux kernel and graphical X server backported from less stable Ubuntu releases to make Ubuntu work better on new hardware. This one doesn’t, but Ubuntu 16.04.2 LTS, which will be released in February 2017, will.