Q: How do I rename a sub-directory? The only way I can find is to make a new one with the new name, copy all the files over from the old one, and then delete the original!
A: As you have found, the MS-DOS REN command doesn’t work on sub-directories. For a programmer it is a relatively trivial task to write a utility to do this job, and DR DOS 6 has a RENDIR command used in the same way as REN.
The manual for MS-DOS 5.0 advises the reader to do what you’re doing already, and indeed DR DOS 5 didn’t make provision for renaming directories. You can, however, use the DOS shell program to rename directories. If you want to stick with the command line, the best alternative is to get hold of a utility program written to do the job. Such programs are commonly found in shareware/PD catalogues.
Better think carefully before choosing that directory name…