Codenamed "Vivid Vervet", 15.04 continues Ubuntu's proud tradition
of integrating the latest and greatest open source technologies into a
high-quality, easy-to-use Linux distribution. The team has been hard at
work through this cycle, introducing new features and fixing bugs.

Under the hood, there have been updates to many core packages, including
a new 3.19-based kernel, a new glibc, and much more.

One of the larger changes this cycle is a switch from upstart to systemd
as the default for managing boot and system service startup.

Ubuntu Desktop has seen incremental improvements, with newer versions of
GTK and Qt, updates to major packages like Firefox and LibreOffice, and
stability improvements to Unity.

Ubuntu Server 15.04 includes the Kilo release of OpenStack, alongside
deployment and management tools that save devops teams time when
deploying distributed applications - whether on private clouds, public
clouds, x86 or ARM servers, or on developer laptops. Several key server
technologies, from MAAS More...