External commandssuggest change
External commands available to Windows command interpreter are separate executable program files, supplied with the operating system by Microsoft, or bundled as standard with the third-party command interpreters. By replacing the program files, the meanings and functions of these commands can be changed.
Many, but not all, external commands support the
/? convention, causing them to write on-line usage information to their standard output and then to exit with a status code of 0.