How can I obtain the file for an external MS-DOS command?
Because each version of MS-DOS and Windows is different, many of the external commands those programs are not going to be compatible. Therefore, if you want to use a certain external command, you'll need to find a third-party utility provides the functionality for you.
Many individuals and companies that have created MS-DOS commands cable of performing new functions. Additionally, there are some programs capable of accomplishing tasks that are not normally possible with any MS-DOS command. Performing a search on any popular search engine for "command line," "download," or "windows" and a brief description of what you are looking to do. For example, searching "windows command line edit files download" would find Windows command line editors.
Note: Some commands may work if copied directly from another computer running the version of Windows or MS-DOS that supports the command to your computer. However, this is not recommended because of incompatibility issues as well as legal issues.