Mkdir
| mkdir | |
|---|---|
| The  mkdircommand | |
| Developer(s) | Various open-source and commercial developers | 
| Operating system | Unix, Unix-like, Plan 9, Inferno, DOS, MSX-DOS, FlexOS, OS/2, Windows, ReactOS, KolibriOS | 
| Platform | Cross-platform | 
| Type | Command | 
| License | GNU coreutils: GPLv3+ MS-DOS, Plan 9: MIT FreeDOS: GPLv2+ ReactOS: GPLv2 | 
(make directory) command in the Unix, DOS, DR FlexOS, IBM OS/2, Microsoft Windows, and ReactOS operating systems is used to make a new directory. It is also available in the EFI shell and in the PHP scripting language. In DOS, OS/2, Windows and ReactOS, the command is often abbreviated to md.
The command is analogous to the Stratus OpenVOS create_dir command. MetaComCo TRIPOS and AmigaDOS provide a similar MakeDir command to create new directories. The numerical computing environments MATLAB and GNU Octave include an mkdir 
function with similar functionality.