"Linux is back in the news, and not just because of the recent
LinuxWorld show in San Francisco.
"The operating system, once the province of hobbyists and geeks,
is going mainstream. A case is building that open-source software,
freely modifiable and subject to constant improvement by a global
community of coders, can pay off in savings and efficiency.
"Take Amazon.com. Last year, the online retailer switched to
Linux across most of its computer network. Amazon had been using a
proprietary version of Unix, a system often found in large