Official site; Commercially sponsored Debian-derived Linux distribution that focuses on usability, a regular 6-month release cycle, and a commitment to at least 18 months of security updates for every release.

A private company founded by South African entrepreneur Mark Shuttleworth for the promotion of Ubuntu and other free software projects.

Ubuntu advocate and founder's weblog.

The official information hub for the Ubuntu community, bringing together news, grassroots marketing, advocacy, team collaboration, and great original content.

Aggregation of blogs by Ubuntu volunteers and developers.

Official help and support forums for Ubuntu.

Article about the distribution on the free encyclopedia. Provides general information on the project.

Provides package information from the official Ubuntu Package archive. Packages can be browsed by their contents and by selected criteria.

A repository of community-edited information on all versions of Ubuntu.

Feature development specifications which are tracked from discussion through to review, approval, and implementation.