Rolling release

Rolling release, also known as rolling update or continuous delivery, is a concept in software development of frequently delivering updates to applications. This is in contrast to a standard or point release development model which uses software versions which replace the previous version. A rolling release model is different from a staged or "staggered" rollout, in which an update is gradually made available to an increasing percentage of users for testing or bandwidth reasons. An example of a rolling release would be Arch Linux, where new packages and updates roll in constantly, and significant changes to the distribution may occur at any time by the developers. This is in contrast to Ubuntu Linux, which has biannual releases, with the only major changes after a release being security updates or significant bug fixes.