Sort of. There’s realtime builds, but the Linux definition of real time is more relaxed than dedicated RTOS’s in exchange for a much more feature-filled OS. You should not use Linux if people could die when you miss a deadline. You want a simple system where it’s easier to prove that can never happen.
Pretty much the only place it doesn’t run is where you have hard real-time requirements and on extremely small embedded micro controllers.
But isn’t there a RTOS Linux kernel?
Sort of. There’s realtime builds, but the Linux definition of real time is more relaxed than dedicated RTOS’s in exchange for a much more feature-filled OS. You should not use Linux if people could die when you miss a deadline. You want a simple system where it’s easier to prove that can never happen.
I believed the kinux kernel recently became real time?