group(4)                                                 group(4)



NAME
     group - group file format

SYNOPSIS
     group

DESCRIPTION
     group contains for each group the following information:

     ⊕ group name

     ⊕ encrypted password

     ⊕ numerical group ID

     ⊕ a comma-separated list of all users allowed in the group

     This file is an ASCII file.  The fields are separated by
     colons; each group is separated from the next by a newline.
     If the password field is null, no password is demanded.

     This file resides in the /etc directory.  Because of the
     encrypted passwords, it has general read permission and can
     be used, for example, to map numerical group IDs to names.

     A group file can have a line beginning with a plus sign (+),
     which means to incorporate entries from the Network
     Information Service (NIS, formerly called ``Yellow Pages'').
     There are two styles of + entries.  By itself, + means to
     insert the entire contents of the NIS group file at that
     point; +name means to insert the entry (if any) for name
     from the NIS group file at that point.  If a + entry has a
     non-null password or group-member field, the contents of
     that field will override the contents of the NIS group file.
     The numerical group ID field cannot be overridden.

EXAMPLES
     In this command:

        +myproject:::carolyn, jennifer
        +:

     if these entries appear at the end of a group file, then the
     group myproject will have members carolyn and jennifer, and
     the password and group ID of the NIS entry for the group
     myproject.  All of the groups listed in the NIS group file
     will be pulled in and placed after the entry for myproject.

LIMITATIONS
     The passwd(1) command won't change group passwords.





January 1992                                                    1

group(4)                                                 group(4)



FILES
     /etc/group
          File containing group information
     /etc/yp/group
          File containing Network Information Service (NIS,
          formerly called ``Yellow Pages'') information

SEE ALSO
     setgroups(2), crypt(3), initgroups(3), passwd(4)

     passwd(1) in A/UX Command Reference












































2                                                    January 1992