Thanks, didn't mean it as a GNU thing at all. Sure, mkdir would've existed back in research Unix too. My experience has only been limited to the Linux envs, which is why I was led to attribute mkdir to the evolution in mknod(), I only know that they all either descended down from SysV or BSD, those who have used the real Unices would know better. Seeing as I haven't had the privilege of using any except briefly on an emulator. On Mon, Oct 21, 2019 at 5:30 PM Thomas Paulsen wrote: > > > Also, I only now realized that only mknod existed, up until a long time, > > > > only later on with the GNU coreutils did mkdir as a command come into > > existence. Running the PDP-11 v7 on SIMH showed that, gotten so > accustomed > > > > to the Linux env that thinking backwards seemed suddenly arcane. > > > that's not true. mkdir isn't a GNU invention. Its much older. > > https://en.wikipedia.org/wiki/Mkdir#History > http://man7.org/linux/man-pages/man2/mknod.2.html > > > -- Abhinav Rajagopalan