These two options let you enumerate the users and groups who are granted or denied access to a particular share. You can enter a list of comma-delimited users, or indicate an NIS or Unix group name by prefixing the name with an at-sign (
@).
The important rule to remember with these options is that any name or group in the
invalid
users list will
always be denied access, even if it is included (in any form) in the
valid
users list. By default, neither option has a value associated with it. If both options have no value, any user is allowed to access the share.
