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NAME    [Toc]    [Back]

       group - Group file

DESCRIPTION    [Toc]    [Back]

       The /etc/group database contains the following information
       for each group: Group name  Encrypted  password  Numerical
       group  ID  A  comma-separated list of all users allowed in
       the group


              Do not put any spaces between a comma and  a  username;
  otherwise,  the username following the comma
              will not be made a part of the desired group.

       The /etc/group file is an ASCII file, with the fields separated
 by colons. Each group is separated from the next by
       a new line. If the password field is null, no password  is

       Because  of  the encrypted passwords, it can and does have
       general read permission and can be used, for  example,  to
       map numerical group IDs to names.

       Note  that  commands  or  scripts used for adding users to
       groups are subject to the  225  character  limit  on  line
       lengths.  However, you can split lines as appropriate.

RESTRICTIONS    [Toc]    [Back]

       Increasing  the  number of groups that a user is in beyond
       16 can affect services that use ONC RPC.  Tru64  UNIX  ONC
       RPC supports up to 32 groups for compatibility with ULTRIX
       Version 4.2 and higher. Other vendors may support only  16
       groups.   ULTRIX  versions  before  4.2  support  up  to 8
       groups.  Users who increase their group membership  beyond
       8  or 16 groups will not be able to NFS mount file systems
       from servers that only support 8 or 16 groups over NFS. In
       addition,  if  root group membership is increased beyond 8
       or 16, the NIS service will not work in a mixed NIS server
       environment where the servers support only 8 or 16 groups.
       The addgroup command limits the length of a group name  to
       eight characters or less.

FILES    [Toc]    [Back]


SEE ALSO    [Toc]    [Back]

       Commands:  addgroup(8),      groupadd(8),      adduser(8),
       groups(1), passwd(1)

       Functions:  setgroups(2)

       Routines:  initgroups(3)

       Files:  passwd(4)

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