illumos
Illumos is an open-source Unix-like operating system that continues the Solaris/OpenSolaris lineage after Oracle curtailed the project. It is maintained by a global community under the Illumos umbrella and provides a shared base for several Solaris-inspired distributions.
The Illumos core, known as illumos-gate, includes kernel and userland components derived from OpenSolaris, notably the
Several distributions build on illumos, forming a family rather than a single OS. OmniOS emphasizes stability
Software management in illumos-based systems typically uses the Image Packaging System (IPS) with the pkg command.