Perihelion OS is based on the Linux kernel and the Debian distribution, chosen as the base for Perihelion OS due to its wide adoption in aerospace, stability, extensibility and security. It is designed to be highly portable between various manufacturers and existing commercial single-board computers. The system is trifurcated into the OS abstraction layer, a Core Flight Executive (cFE) derivation, and a custom built application layer. As NASA's CFS system is designed to be platform agnostic, work is on-going to further integrate it into the Linux system e.g. usage of native logging services. For (soft) real-time support, the PREMPT-RT system is employed to provide real-time services; however, usage of hardware based real-time support such as a PRU is still recommended for hard real-time demands.