Linux vendor Novell Inc. has acquired Immunix Inc., a security software vendor in Portland, Ore. The 15-person company was bought last week, but terms of the deal aren't being released, according to Novell.

Immunix was founded in 1998, in part with money from the Defense Advanced Research Projects Agency, to develop security software for Linux. It's best known for developing much of the Linux Security Modules software that's used in the Linux 2.6 kernel, a key component of the Linux operating system.

By acquiring the company, Novell hopes to strengthen its security product offerings, said Charlie Ungashick, a director of product marketing at Novell. "Security is becoming a really hot topic, particularly around Linux," he said.

Immunix sells software called AppArmor that can be used to secure Linux-based applications by limiting how they can interact with hardware within the computer.

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