group(5yp)group(5yp)Namegroup - group file in a Yellow Pages environment
For each group, the file contains:
Numerical group ID
Comma-separated list of all users allowed in the group
This is an ASCII file. The fields are separated by colons. Each group
is separated from the next by a new-line. If the password field is
null, no password is needed.
This file resides in the directory. Because of the encrypted pass‐
words, it can and does have general read permission and can be used,
for example, to map numerical group ID's to names.
A group file can have a line beginning with a plus (+), which means to
incorporate entries from the Yellow Pages. There are two styles of +
entries: All by itself, + means to insert the entire contents of the
Yellow Pages group file at that point; +name means to insert the entry
(if any) for name from the Yellow Pages at that point. If a + entry
has a password or group member field that is not null, the contents of
that field will override what is contained in the Yellow Pages. The
numerical group ID field cannot be overridden.
If these entries appear at the end of a group file, then the group
myproject will have members bill and steve, and the password and group
ID of the Yellow Pages entry for the group myproject. All the groups
listed in the Yellow Pages will be pulled in and placed after the entry
The command will not change group passwords.
ULTRIX file system group file
Yellow Pages group map
See Alsoyppasswd(1yp), setgroups(2), crypt(3), initgroups(3x), passwd(5yp)group(5yp)