China DOS Union

First, you need to know what an "external command" is.

Second, you need to know which version of the "external command" you want. Different versions of DOS may have different external commands.

Third, go find the corresponding version of the DOS installation package!

If you want complete DOS external commands, then find the corresponding version of the DOS installation package, which contains complete external commands. (If the command you are trying to execute still cannot be executed, then it means one thing: it is not an external command.)

If you ask for the download address, in fact, there is a hint on the forum homepage:

To download/read various DOS software and DOS materials, please go to: http://newdos.yginfo.net/

Why don't you read it???

The following is prepared specifically for these "lazybones":

MS-DOS 6.22 Complete Installation Version 3.76M
http://members.rogers.com/milanko-r/dos622.zip

MS-DOS 6.22 Chinese Complete Version (This is a full Chinese version of DOS, with internal commands and help all Chineseized) 9.73M
http://www.cn-dos.net/dosware/pdos622.zip

MS-DOS 7.10 Complete Direct Run Version (Combined by me with its basic commands and its supplementary tools, etc.) 2.22M
http://www.cn-dos.net/dosware/msdos710.zip

MS-DOS 7.00 Supplementary Files (such as HELP, MEMMAKER, etc., issued by Microsoft Corporation) 836K
ftp://ftp.microsoft.com/softlib/mslfiles/olddos.exe

The last one contains the help external command.

Hehe... ko... I'm afraid they won't setver.

Yeah, I don't know. How to set the version number? Can you tell me?

Enter the directory where setver is located. Execute setver x.xxx (the application for which the version needs to be set) v.vv (version number)

In DOS, if you don't know how to use a certain command, generally you can:
1. Directly type this command without parameters, and it may display the help information.
2. Type the command plus / plus?, such as (dir/?), most commands support this to call out the help information.
3. Type the command plus / plus H, such as (dir/H), most commands also support this to call out the help information.
4. Some commands don't add /, but leave a space and then add? or H. Some don't add /, but add the "-" sign.