chgrp(1) on FreeBSD
The text 111d4df518e1, as FreeBSD 2.1.7.1-RELEASE, FreeBSD 2.1.7-RELEASE, FreeBSD 2.1.5-RELEASE, FreeBSD 2.0.5-RELEASE shipped it.
change group
Flags it lists
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-H -
-L -
-P -
-R -
-f