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NAME    [Toc]    [Back]

       chgrp - Changes the group ownership of a file or directory

SYNOPSIS    [Toc]    [Back]

       chgrp [-fhR] group file

       The chgrp command changes the group  associated  with  the
       specified file or directory to group.

STANDARDS    [Toc]    [Back]

       Interfaces  documented  on  this reference page conform to
       industry standards as follows:

       chgrp:  XCU5.0

       Refer to the standards(5) reference page for more information
 about industry standards and associated tags.

OPTIONS    [Toc]    [Back]

       [Tru64  UNIX]  Suppresses  all  error  reporting.   [Tru64
       UNIX]  If file is a symbolic link, the  command  chgrp  -h
       file  changes  the group of the symbolic link. The command
       chgrp file changes the group of the file referenced by the
       symbolic   link.   Causes  chgrp  to  descend  recursively
       through its directory  arguments,  setting  the  specified
       group ID.

OPERANDS    [Toc]    [Back]

       A  group  name  from the group database or a numeric group
       ID.  Either specifies a group ID to be given to each  file
       named  by  one  of  the  file operands. If a numeric group
       operand exists in the group database as a group name,  the
       group ID number associated with that group name is used as
       the group ID.  A pathname of a file whose group ID  is  to
       be modified.

DESCRIPTION    [Toc]    [Back]

       To  change the group ID of a file, you must have superuser
       privilege or your effective user ID must match  the  owner
       ID of the file. If you do not have superuser privilege you
       can change the group ID of a file only to  your  effective
       group  ID  or  to  the value of a group of which you are a

       The group argument must be either a valid group name  that
       already  exists in the group database or a valid group ID.

       For each file operand, the chgrp command performs  actions
       equivalent to the chown() function called with the following
 arguments: The file operand is used as the path  argument.
   The user ID of the file is used as the owner argument.
  The specified group ID is used as the  group  argument.

       Unless  the  chgrp  command  is  invoked by a process with
       appropriate privileges, the set-user-ID  and  set-group-ID
       bits of a file are cleared upon successful completion.

NOTES    [Toc]    [Back]

       If  the  chgrp  command  is invoked with the -R option and
       attempts but fails to change the group ID of a  particular
       file  in  a specified file hierarchy, it continues to process
 the remaining files in the hierarchy.  If  the  chgrp
       command cannot read or search a directory within a hierarchy,
 it continues to process the other parts of the  hierarchy
 that are accessible.

EXIT STATUS    [Toc]    [Back]

       The following exit values are returned: Successful completion,
 all requested changes were made.  An error occurred.

EXAMPLES    [Toc]    [Back]

       To  change  the  group  ownership of the file or directory
       named proposals to staff, enter: chgrp staff proposals

       The group access permissions for proposals  now  apply  to
       staff.  See chmod for details.


       The  following  environment variables affect the execution
       of chgrp: Provides a default value for the  internationalization
 variables that are unset or null. If LANG is unset
       or null, the corresponding value from the  default  locale
       is  used.   If  any  of the internationalization variables
       contain an invalid setting, the utility behaves as if none
       of  the variables had been defined.  If set to a non-empty
       string value, overrides the values of all the other internationalization
  variables.  Determines the locale for the
       interpretation of sequences of bytes of text data as characters
  (for  example, single-byte as opposed to multibyte
       characters in arguments).  Determines the locale  for  the
       format  and  contents  of  diagnostic  messages written to
       standard error.  Determines the location of message  catalogues
 for the processing of LC_MESSAGES.

FILES    [Toc]    [Back]

       Contains group information.

SEE ALSO    [Toc]    [Back]

       Commands:  chmod(1), chown(1), groups(1)

       Functions:  chmod(2), chown(2)

       Files:  group(4)

       Standards:  standards(5)

[ Back ]
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