Ubuntu 11.10 is an open source distribution of Linux based on the Debian GNU/Linux operating system and built around the Unity 3D desktop environment. It is the second release to use the controversial Unity interface.
Dubbed Oneiric Ocelot, Ubuntu 11.10 is distributed as Desktop and Alternate Live CD ISO images for both 32-bit and 64-bit architectures. In addition, users can download the system in DVD format, as well as specific Server, ARM, Cloud and Netboot editions that can be found on our website.
Distributed as Desktop and Alternate editions
Both Desktop and Alternate flavors are distributed as two Live DVD ISO images, one for each of the supported hardware platforms (amd64 and i386). As usual, the boot prompt allows users to try Ubuntu without installing, run a memory test, boot an existing operating system, as well as to install the entire OS without testing it (not recommended).
Introduces the Unity 2D desktop environment
Oneiric Ocelot was known for introducing the 2D version of the Unity desktop environment, allowing users to use the Ubuntu operating system on machines with low-end graphics cards or without video drivers, as well as in virtual machines. As mentioned, even if it uses the Unity user interface, most of its core components are still based on the GNOME project.
Default application include the Mozilla Thunderbird email client, Banshee music player, Mozilla Firefox web browser, Shotwell image viewer and organizer, and much more. It is powered by Linux kernel 3.0.4, X.Org 7.6, Xorg Server 1.10.4, Upstart 1.3, GCC 4.6 toolchain, Python 2.7.2, Compiz Fusion 0.9.6, Unity 3D interface 4.22, Unity 2D interface 4.12, and GNOME 3.2.0.
It is no longer supported by Canonical
The system was official announced on October 13, 2011, and supported with security updates and important patches until May 9, 2013. This means that all the software provided in this ISO images are old, unsafe and unsupported.