Infrastructure Services translate and deploy business and application requirements into physical infrastructure elements. The Infrastructure Services practice consists of three capabilities: Systems Engineering, Network Engineering, and Security. Interoperability, security, scalability and open are some of the key requirements today's organizations are expecting from any platform to base their Enterprise applications on. Linux in general and many companies like RedHat , Novell SUSE , Ubuntu , etc. Linux is based completely on opensource components and hence does not have any server or user licenses. The cost that you pay is for structured support and maintenance and is fixed and predictable. More and more mission critical applications are being made available on Linux with every passing day.