Is Linux growing at Windows' or Unix's expense?

Windows may be king of data centers, but Linux has a foothold in nearly every courtyard and is sure to make further inroads in the year ahead.

According to the Data Center Decisions 2008 Purchasing Intentions Survey, 91% of data centers run Microsoft Windows, but a large percentage also use Red Hat Enterprise Linux (48%) or Novell SUSE (21%, multiple versions) in their data centers. Nonetheless, Linux use remains limited in scope, with two-thirds of respondents running Linux on 25% or less of their servers, with application servers the most common pairing.

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