Epson 10020 - Manual (Page 72)

You can shorten the RENAME command to REN. To change
the name of a file from HAMMERS to WRENCHES,
therefore, you can type the following and press Enter:
REN HAMMERS WRENCHES
You can use wildcards to rename groups of files. For example, to
change just the extensions of all files on drive B with the
extension .NEW to .OLD, type the following and press Enter:
REN B:*.NEW *.OLD
To add the extension .OLD to all files that begin with the same
five characters, MEMOS,
but end with one varying character,
type the following and press Enter:
REN MEMOS? MEMOS?.OLD
This command would rename files such as MEMO1 and
MEMO2 to MEMO1.OLD and MEMO2.OLD.
See your MS-DOS Reference Manual for more information on
the RENAME command.
Deleting Files
You can delete files you no longer need with the DEL (delete)
command. For example, to delete REPORT.AUG from drive
B, type the following and press Enter:
DEL B:REPORT.AUG
To delete the file WRENCHES from drive B, type the
following and press Enter:
DEL B:WRENCHES
Using MS-DOS With Your Computer 3-13