1. Ubuntu Server Jaunty 9.04 Server Features

2. Kernel Ubuntu 9.04 Server includes the 2.6.28 Memory management improvements Scalability improvements Tracepoints KVM improvements more...

3. EXT4 Optional Ext4 filesystem support EXT3 is still the default filesystem

4. Cloud computing Eucalyptus Available as a Technology Preview Create your own private cloud that matches the Amazon EC2 API. Utilize open EBS (elastic block storage) and S3 (Simple Storage Service) equivalent storage systems.

5. Advanced Message Queue Protocol (AMQP) High-performance enterprise messaging via Rabbit MQ

6. Virtualization Open Nebula (New) Virtual infrastructure management engine. Virt-Manager a lightweight interface for interacting with the graphical display of virtualized guest OS. Support for nested virtualization KVM, Xen, VMWare support

7. Turn-key Mail Servers Dovecot-Postfix package in Ubuntu 9.04 provides an easy-to-deploy mail server stack, with support for SMTP, POP3, and IMAP with TLS and SASL.

8. Security AppArmor name-based mandatory access controls. Confines applications to a specific set of capabilities UFW Uncomplicated FireWall ”ufw is not intended to provide complete firewall functionality via its command interface, but instead provides an easy way to add or remove simple rules. It is currently mainly used for host-based firewalls”

9. Samba 3.3 Extended cluster support Better integration with the latest Microsoft systems

10. Pre-Configured Server Stacks Tomcat Java Server Samba File Server Print Server PostgreSQL Server OpenSSH Server Mail Server DNS Server Virtual Machine Host LAMP Server more....

11. Hardware Certification Certified on systems from IBM, Dell, HP, and Sun.