The description below is from the book DOS the Easy Way by Everett Murdock Ph.D.
CLICK HERE for information about downloading the book.
Type: External (3.0 and later)
SHARE [/F:(space)] [/L:(locks)]
Purpose: Installs support for file sharing and file locking.
The SHARE command is used only when networking is active. After you use
command, DOS will check all read or write requests to determine the file
or locking status.
The SHARE command can be included in the AUTOEXEC.BAT file to install
/F:space - Allocates file space (in bytes) for the area DOS will use
record file sharing information. Each file that is opened needs the
the full filename plus eleven extra bytes of memory (the average is 20
If you do not specify a value, it is set to 2048 bytes.
/L:locks - Allocates the number of locks to allow. If you do not
value, it is set to 20 locks.
To load file sharing and use the default values for the /F and /L