NAME

chgrp − change the group ownership of a file

SYNOPSIS

chgrp [−R] [−h] group file . . . 

DESCRIPTION

chgrp changes the group ID of the files given as arguments to group.  The group may be either a decimal group ID or a group name found in the group ID file, /etc/group. 

You must be the owner of the file, or be the super-user to use this command. 

The operating system has a configuration option {_POSIX_CHOWN_RESTRICTED}, to restrict ownership changes.  When this option is in effect, the owner of the file may change the group of the file only to a group to which the owner belongs.  Only the super-user can arbitrarily change owner IDs whether this option is in effect or not. 

chgrp has one option:

−R Recursive.  chgrp descends through the directory, and any subdirectories, setting the specified group ID as it proceeds.  When symbolic links are encountered, they are traversed. 

−h If the file is a symbolic link, change the group of the symbolic link.  Without this option, the group of the file referenced by the symbolic link is changed. 

FILES

/etc/group

SEE ALSO

chmod(1), chown(1), id(1M), chown(2), group(4), passwd(4). 

NOTES

In a Remote File Sharing environment, you may not have the permissions that the output of the ls −l command leads you to believe. 

  —  Essential Utilities