Is it just / ?
I kid. But really, besides “its all a file”, if you take away the gui, is the only difference the syntax ? How libraries interact? How disks are mounted ?
If we stripped all ms’s junk out and made windows open source, would we still prefer linux?
When you get to a very basic level, is one of them more efficiently coded?
You rather should ask what separates Windows from all the Unix-likes. Windows is the weird one, not Linux.
This got me thinking, are there any other non-Unix-based OS’s left? Really, for any hardware more sophisticated than say, an ESP? At all?
I honestly can’t think of one.
OpenVMS is still semi-maintained. It’s DEC’s old operating system that Windows NT draws some inspiration from because Microsoft hired a bunch of ex-DEC engineers.
There’s also 9front, a fork of Bell Labs’ Plan9.
Wegmans’ checkout uses Toshiba 4690 OS, which I think is vaguely descended from CP/M.
I think IBM still maintains their i operating system, which used to be called OS/400.
Network equipment like enterprise routers and switches tend to run weird unique things, Cisco equipment runs IOS and Adtran equipment runs AOS.
The OS bundled with TI-84 Plus CE Python Edition graphing calculators is a wacky one. It runs primarily on an eZ80 core for backwards-compatibility with earlier graphing calculators while also handling an ARM core for Python functions. Parts of the assembly code can be traced back to the TI-82 calculator ROM from 1993.
Most people wouldn’t think a calculator would ever need a security solution, but it even verifies application signatures so students are less likely to load cheating utilities on them.
FreeBSD?
FreeBSD is closer to Unix than Linux is
Fair enough, never took a real look at it.
FreeBSD is actually a “real unix”, in the sense that it is derived from the original source. Wikipedia has this nice ancestry tree: https://upload.wikimedia.org/wikipedia/commons/7/77/Unix_history-simple.svg