group_override man page on HP-UX

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group_override(5)					     group_override(5)

       group_override - The registry group override file.


       The  dcelocal/etc/group_override	 administrative file lets you override
       group UNIX IDs and member lists stored in the  network  registry	 data‐
       base.   The  group_override  file  functions in a similar manner as the
       passwd_override file that overrides principal information in  the  net‐
       work  registry  database.   The	override  takes	 effect	 when  you run
       passwd_export. It may also impact local security mechanisms  of	vendor
       specific implementations.

       The group_override file is stored on each machine. Any changes you make
       to it are in effect for the local machine only, and have no  effect  on
       the centralized registry. You may find group_override especially useful
       for overriding the default group definitions supplied with the registry
       if they do not match your local UNIX system's group definitions.

   The group_override File Format
       The  format  of group_override entries is similar to the entries in the
       UNIX	group	  file.	    The	    format     is     as      follows:

       In  the	override  entry,  group_name and group_uid are keyfields.  You
       must enter one to identify the group to which the override applies. The
       keyfield	 is  used to perform a lookup in the override file. The lookup
       is performed in order as the fields are specified in the	 entry:	 first
       by  group name, then by group UNIX ID. If you specify both keyfields in
       an override entry, the group_name is used as the lookup key; subsequent
       fields are used as overrides.

   Field Descriptions
       Each entry in the group_override file is described below.

       A  keyfield  that  contains the name that identifies the group to which
       the override applies.  The encrypted password. If you specify an	 over‐
       ride  in this field, the password you enter is in effect for this local
       machine only.

       You can also specify OMIT in the passwd field  to  disallow  using  the
       newgrp  command on the local machine to change a user's group identifi‐
       cation.	The  use  of  OMIT  in	conjunction  with  an  option  to  the
       passwd_export  command also prevents the inclusion of this group in the
       group file created by passwd_export. (See the section  entitled	"Using
       OMIT," later in this command reference, for details.)  A group UNIX ID.
       This field can function as a keyfield,  when  no	 other	keyfields  are
       entered, or as a field containing an override, when entered in conjunc‐
       tion with group_name.  When used as an override, this  field  specifies
       the  ID	to  be used for the group on the local machine.	 A comma-sepa‐
       rated list of members of the group. The contents of this field override
       information  in	the  registry when passwd_export creates an /etc/group
       file. Note that to specify a null membership, as opposed to  indicating
       no override is required, use an asterisk (*) for this field.

   Leaving Fields Blank
       If you do not want to override an item, leave its field blank, separat‐
       ing each blank field with a colon (:). Note that to  override  a	 group
       with  a	null  membership  list,	 enter an asterisk (*) for the members

   Using OMIT
       If you enter either the word OMIT or another  invalid  password	string
       (such as an asterisk or NO GOOD) in the passwd field, users will not be
       able to issue a newgrp to this group on the local machine. If you spec‐
       ify OMIT and run passwd_export with the -x option, the named group will
       not appear in the /etc/group file produced by passwd_export.

       You should also be aware that, if you  have  omitted  groups  from  the
       /etc/group  file,  information about those groups will not be available
       to any programs that use the group file. For example, the ls  -lg  com‐
       mand  accesses  the  group  file	 to obtain further information about a
       group. If the group is omitted, no group entry will exist and no infor‐
       mation  will  be available. For this reason you should use OMIT to omit
       groups from the /etc/group file only if your  user  community  is  very
       large  and  either of the following conditions occur: The group file is
       taking up too much space.  Group-ID-to-name mapping is too slow (during
       ls -lg, for example).

       To  assign the group named "kmem" a group ID of 3 on the local machine,
       the entry in the group_override file is as follows: kmem::3:  To	 over‐
       ride  the  membership  list of the group named "system" so that it con‐
       tains only the single member named "root," the entry is as follows:


       Command: passwd_export(1m)


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