.Dd January 30, 2015 .Dt CHGRP 1 .Os .Sh NAME .Nm chgrp .Nd change the file group ownership .Sh SYNOPSIS .Nm .Op Fl R .Ar groupname .Op Ar file... .Sh DESCRIPTION .Nm sets the group id of the files specified by .Ar file to the gid of the group named .Ar group. If the .Fl R flag is specified, this process is recursively applied to everything in .Ar file . .Sh SEE ALSO .Xr chown 1 , .Xr chown 2 , .Xr chmod 1 , .Xr chmod 2 , .Xr getgrnam 3