chgrp linux command

The chgrp command is used to change the group that has access to files and directories. All files in linux belong to an owner, and a group. The owner is set by the chown command, and the group by the chgrp command.

Syntax:

chgrp newgroup filename(s) [-options]

Options :

       -c, --changes

              like verbose but report only when a change is made

       --dereference

              affect the referent of each symbolic link, rather than the symbolic 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

Examples:

       1) chgrp tech /file.txt

              Change the group of /file.txt to "tech".

       2) chgrp -hR tech /file.txt

              Change the group of /file.txt and subfiles to "tech".