Why Linux?
Robust, Low Maintenance, Low Cost
Linux Servers Offers
Robust, Low Maintenance and Low Cost Applications
Linux runs for months without requiring maintenance. Linux and the server applications does not hide configuration details for the administrator (this can be a pro and a con). Linux offers non-bloated services that do a few things but do them well.
Usage examples
Intranet applications
More about Linux
Read more about Linux in the LWN.net or in the Linux Magazine.