A WSL alternative for users who prefer an MS-DOS environment. DOS Subsystem for Linux integrates a real Linux environment into MS-DOS systems, allowing users to make use of both DOS and Linux applications from the DOS command prompt.
What is this unholy union.
This is how the best science starts off, not with a why but with a why not!
Wow! It actually kinda makes sense (will not spoil it now).
First I thought it was a hoax, especially after seeing the relatively thin source tree. Checking around, there was a simple Makefile a few assembly and C sources and that would be pretty much the main part. There was a linux kernel config, along with a busybox one, but those could be easily faked.
But digging into the code, I saw this line:
And everything clicked. It can actually happen.
(Hint: It is not actually Linux running under DOS, but keeping both around with a very clever trick).