8 .Nd login access control table
12 file specifies on which ttys or from which hosts certain users are
17 file is checked for the first entry that matches a specific user/host
18 or user/tty combination. That entry can either allow or deny login
21 Each entry have three fields separated by colon:
24 The first field indicates the permission given if the entry matches.
32 The second field is a comma separated list of users or groups for
33 which the current entry applies. NIS netgroups can used (if
34 configured) if preceded by @. The magic string ALL matches all users.
35 A group will match if the user is a member of that group, or it is the
38 The third field is a list of ttys, or network names. A network name
39 can be either a hostname, a domain (indicated by a starting period),
40 or a netgroup. As with the user list, ALL matches anything. LOCAL
41 matches a string not containing a period.
44 If the string EXCEPT is found in either the user or from list, the
45 rest of the list are exceptions to the list before EXCEPT.
47 If there's a user and a group with the same name, there is no way to
48 make the group match if the user also matches.
54 function was written by
55 Wietse Venema. This manual page was written for Heimdal.