.CD "chgrp \(en change group"
.SX "chgrp [\fB\(enR\fR] [\fIowner:\fR]\fIgroup \fIfile\fR ..."
.FL "\(enR" "Change directory hierarchies"
.EX "chgrp system file1 file2" "Make \fIsystem\fR the group of the files"
.EX "chrgp \(enR other dir1" "Make \fIother\fR the group of all files below dir1"
.PP
The group field (and optionally owner field) of the named files is changed to 
.I group
and
.I owner .
Alternatively, a decimal gid (uid) may be specified instead of a group name.
If the \fB\(enR\fR flag is used, the changes will be applied recursively to
all files in named directories. Only the superuser may execute this command.