over 20 million users world wide (example: ~50% of all the webservers running in 2001)
graph:
Market Share for Top Servers Across All Domains
source: http://www.netcraft.com/survey/)
source: http://www.netcraft.com/survey/
)
at home on Intel/AMD, PowerPC, Alpha, SPARC, ARM, MC680x0, MIPS and many more
(it was the first OS to run on the new Intel Itanium 64 bit chip)
it's
free
and
Open Source
software
available in many different
Distributions
(packages that contain OS, documentation and many various applications)
Powerful support for network and Information Technology tools