
The distribution's commercial sponsor Canonical also will bundle Sun's open source GlassFish application server for Java Enterprise Edition 5 that is due out later this year.
The Linux distribution last summer started offering the Java runtime environment as an optional download.
Ubuntu is based on Debian. The software is a popular desktop Linux version and last June also launched a server version.
Canonical aims to create a business around the Linux distribution by offering support. But instead of bundling support with updates through annual subscription plans such as the ones that are offered by Red Hat or Novell, Canonical plans to build a network of independent support providers.
Sun earlier this year started certifying Ubuntu for its Niagara servers. The company today is expanding the certification with its SunFire X4100 and X4200 AMD Opteron servers as well as the Sun Ultra 20 and 40 workstations.
The server maker so far is the only mainstream hardware vendor certify its hardware for Ubuntu.