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Command Prompt, also known as cmd.exe or cmd, is the default command-line interpreter for the OS/2, [1] eComStation, ArcaOS, Microsoft Windows (Windows NT family and Windows CE family), and ReactOS [2] operating systems.
In most computer file systems, every directory has an entry (usually named ".") which points to the directory itself.In most DOS and UNIX command shells, as well as in the Microsoft Windows command line interpreters cmd.exe and Windows PowerShell, the working directory can be changed by using the CD or CHDIR commands.
A CMD file has a 128-byte header, followed by 1–8 groups of code or data. [2] Each group can be up to 1 megabyte in size. In later versions of the format, CMD files can also contain relocation information and Resident System Extensions (RSXs). [2] The start of the header lists the groups present in the file, and their types.
The Windows Subsystem for Linux running Bash on Windows 10 Cmd.exe running on Windows CE 3.0. Traditionally, the Client/Server Runtime Subsystem (CSRSS) has been responsible for managing console windows on the Windows NT family of operating systems. [7] In Windows 7, CSRSS spawns one conhost.exe for each console window, to manage it.
Microsoft released a version of cmd.exe for Windows 9x and ME called WIN95CMD to allow users of older versions of Windows to use certain cmd.exe-style batch files. As of Windows 8, cmd.exe is the normal command interpreter for batch files; the older COMMAND.COM can be run as well in 32-bit versions of Windows able to run 16-bit programs.
COMMAND.COM is the default command-line interpreter for MS-DOS, Windows 95, Windows 98 and Windows Me.In the case of DOS, it is the default user interface as well. [2] It has an additional role as the usual first program run after boot (init process), hence being responsible for setting up the system by running the AUTOEXEC.BAT configuration file, and being the ancestor of all processes.
The command is primarily used to manage network resources. [2] It is an external command implemented as net.exe. [3] When used in a batch file, the /Y or /N switches can be used to unconditionally answer Yes or No to questions returned by the command. [2]
Batch files with .cmd filename extension in OS/2, Windows NT, 4OS2, 4NT and Take Command REXX scripts in OS/2 using the native or an alternative REXX interpreter Topics referred to by the same term