Every six months between LTS versions, Canonical publishes an interim release of Ubuntu, with 20.10 being the latest example.

Does Ubuntu update automatically?

The reason is that Ubuntu takes your system’s security very seriously. By default, it automatically checks for system updates daily and if it finds any security updates, it downloads those updates and install them on its own. For normal system and application updates, it notifies you via the Software Updater tool.

How long does Ubuntu upgrade take?

The upgrade process takes a few clicks and 30 minutes to 2 hours depending on your internet speed. All your data and most of the application settings remains the same in the existing system. However, making a data backup on external disk is always recommended.