Welcome to the Precise Pangolin edition of Ubuntu Server, which is also the third LTS (Long Term Support) release of this extremely stable and reliable server oriented operating system powered by the upstream Debian Linux technologies.
Availability and supported architectures
Ubuntu Server 12.04 LTS was officially announced by Canonical on April 26, 2012 and it will be supported with security patches and software updates until April 2017. The user can download it as CD-size ISO images for the 64-bit and 32-bit architectures.
You can now install multiple servers with MAAS
The "Enlist system with Ubuntu Orchestra Server" options from Ubuntu 11.10 has been replaced with "Multiple server install with MAAS," allowing the user to install Ubuntu on multiple server machines using Canonical's MAAS (Metal as a Service) tool.
Among other boot options, we can mention the ability to start the text-mode installer, perform a system memory test, boot an existing operating system from the first disk, rescue a broken OS or check the integrity of the disc (only if using a CD media).
Straightforward text-mode installer
Ubuntu Server can only be installed on a local drive using a text-mode installer script, which requires you to choose a language, location and keyboard layout, set up the hostname, create a user, configure the timezone, partition the disk, select and install software, as well as to choose where to install the boot loader.
Choose the server that fits your needs
As usual, Ubuntu can be installed as a dedicated OpenSSH server, DNS server, LAMP server, Mail server, PostgreSQL database server, Print server, Samba file server, Tomcat Java server, and Virtual Machine host.
In conclusion, Ubuntu Server 12.04 LTS is Canonical's best server oriented operating system, so far. It is always powered by a stable Linux kernel, uses the latest Debian technologies, and it's supported until April 2017.