chgrp games /usr/lib/games/crafty/book.lrn \
/usr/lib/games/crafty/position.{bin,lrn}
chmod g+w /usr/lib/games/crafty/book.lrn \
chgrp games /usr/lib/games/crafty/book.lrn \
/usr/lib/games/crafty/position.{bin,lrn}
chmod g+w /usr/lib/games/crafty/book.lrn \