From Information Week

A Linux Foundation survey found increasing preference for the open source operating system in new server deployments.
A recent survey of 1,948 users found Windows edging out Unix as the top operating system that Linux replaces in migration projects.

Linux's presence in the data center has grown rapidly alongside Windows' -- together the two have been the fastest growing data center operating systems, frequently at the expense of Unix. Now a new survey by the Linux Foundation suggests that, at least among large Linux users, Linux is growing at the expense of Windows, too.

It's hard to get a precise picture of Linux's position in the data center. No one company owns it, and various versions are readily available through free download, which no one claims to track. The Linux Foundation turned to known Linux users, the members of its End User Council, and 1,900 other enterprise and government Linux users selected by the Yoeman Technology Group.

When Linux growth has been tracked over the past decade, much of it was attributed to migrations from the former Sun Microsystems' Solaris, IBM AIX, and HP-UX and other Unixes. In the recent survey, "migrations to Linux from Windows are surpassing those from Unix," the report said, with 37% coming from Windows and 31% from the Unixes.

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