如何umount在 Linux 系统上强制分区？通常我只会输入sudo umount /dev/<Device>，但如果设备正忙，它会返回
umount: <Mount Location>: target is busy
(In some cases useful info about processes that
use the device is found by lsof(8) or fuser(1).)
我怎样才能强迫umount？
mount ×1