以下哪个命令接受--preserve-root标志？

Question

以下哪个命令接受--preserve-root标志？

chgrp
chmod
rm
rsync

Answer 1

for cmd in chgrp chmod rm rsync; do 
    man "$cmd" | grep -q "preserve-root" && echo "$cmd"
done

或

$ for i in chgrp chmod rm rsync; do $i --help | grep -q '\-\-preserve\-root' && echo $i; done
chgrp
chmod
rm