DOS Command Replace
Type: External (3.2 and later)
Syntax:
REPLACE [d:][path]filename [d:][path][/A][/P][/R][/S][/U][/W]
Purpose: Replaces stored files with files of the same name
from a different storage location.
Discussion
This command replaces files in the target path designation with
files of the same name in the source location.
You can use wildcard characters (? and *) to indicate groups of
filenames in the source directories. You cannot use this command to
replace hidden files or system files.
As files are replaced, the program displays their filenames on the
screen. After the replace operation is complete, it displays
n file(s) added/replaced
After this command terminates, it sets one of the following exit
codes:
0 - Command completed successfully
1 - Command line error
2 - File not found
3 - Path not found
5 - Access denied
8 - Insufficient memory available
15 - Invalid drive
Options
/A - Adds files specified by the source path designation that DO NOT
exist on the target path designation. By using this option, you can
selectively add files to a directory: a file in the source path
designation that has the same name as a file on the target
designation will not be affected.
This option cannot be used in combination with the /S option.
/P - Displays a prompt before each file is replaced allowing you to
decide on a file-by-file basis whether or not to allow the
replacement.
/R - Replaces both read-only and unprotected files on the target
directory. Without this option, any attempt to REPLACE a read-only
file will result in an error message and the replacement process
will terminate.
/S - Acts both on the target directory and all subdirectories within
the target directory. You cannot use the /A option together with
this option.
/U - Replaces files on the target drive or directory that are older
than their counterparts on the source drive.
/W - Waits for you to insert a disk before starting the replacement
process.
Examples
To replace all copies of the file MAIN.EXE on all directories within
the root directory of drive C with a file of the same name that is
stored in the SPECIAL directory on drive A, enter
a: \special\main.exe c:\/s
To add all files from the NEWFILES directory on drive A that have
the .PCX filename extension to the FILES directory on drive C (as
long as no file of the same name already exists there), enter
a:\newfiles\*.pcx c:\files/a
This page is from http://www.easydos.com. I pasted it on my website to avoid possible broken links. For further help with DOS commands, Check easydos.com out.