Comment by hot_gril

3 years ago

There is a Linux emulator for Unix (namely FreeBSD), and it's one of the first examples in the Wikipedia article on emulation. https://www.openbsd.org/60.html shows OpenBSD removing "Linux emulation."

Linux was never designed to be the same as Unix, just similar. But it's more popular now, so Unix users found utility in pretending to run Linux.