The United Launch Alliance (ULA) Atlas V rocket launched SBIRS GEO Flight 5, the fifth flight of Space Based Infrared System (SBIRS) Geosynchronous Earth Orbit. It is the 87th Atlas V launch and the 8th in the 421 configuration. TuxCare services from CloudLinux provide automated security patches and updates for the systems supporting the rocket. This work supports Department of Defense and Space Force missions to protect U.S. National Security. ULA boasts more than 15 years of 100% mission success founded on more than 600 Atlas program launches.
Source: https://www.helpnetsecurity.com/2021/05/27/cloudlinux-department-of-defense/