chgrp

chgrp   Change the group ownership of files

 chgrp [OPTION]... GROUP FILE...
       chgrp [OPTION]... --reference=RFILE FILE...

DESCRIPTION

       Change  the  group of each FILE to GROUP.  With --reference, change the
       group of each FILE to that of RFILE.

       -c, --changes
              like verbose but report only when a change is made

       --dereference
              affect the referent of each symbolic link, rather than the  sym-
              bolic link itself (this is the default)

       -h, --no-dereference
              affect each symbolic link instead of any referenced file (useful
              only on systems that can change the ownership of a symlink)

       --no-preserve-root do not treat '/' specially (the default)

       --preserve-root
              fail to operate recursively on '/'

       -f, --silent, --quiet
              suppress most error messages

       --reference=RFILE
              use RFILE's group rather than the specifying GROUP value

       -R, --recursive
              operate on files and directories recursively

       -v, --verbose
              output a diagnostic for every file processed

       The following options modify how a hierarchy is traversed when  the  -R
       option  is  also  specified.   If  more than one is specified, only the
       final one takes effect.

       -H     if a command line argument is a symbolic link  to  a  directory,
              traverse it

       -L     traverse every symbolic link to a directory encountered

       -P     do not traverse any symbolic links (default)

       --help display this help and exit

       --version
              output version information and exit

       Copyright (C) 2006 Free Software Foundation, Inc.
       This  is  free  software.   You may redistribute copies of it under the
       terms      of      the      GNU      General       Public       License
       <http://www.gnu.org/licenses/gpl.html>.   There  is NO WARRANTY, to the
       extent permitted by law.