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The Defense Information Systems Agency has released a security technical implementation guide to ensure the secure installation of the Tri-Lab Operating System Stack 4.

The TOSS 4 STIG outlines requirements to guide the installation of the production simulation environment in compliance with the Defense Department’s security requirements, the DoD Cyber Exchange said Thursday. 

TOSS is a Red Hat Linux-based operating system designed for a common computing environment used by three National Nuclear Security Administration laboratories: Lawrence Livermore, Los Alamos and Sandia.