linux下取消挂载时报xxxx device is bus

报错现象;

取消使用umount /u01/mount/会出现

umount2: Device or resource busy

umount: /u01/mount: device is busy.

(In some cases useful info about processes that use

the device is found by lsof(8) or fuser(1))

解决办法：

这时fuser命令就有派上用场了：

fuser -km /u01/mount/

/u01/mount: 29850c

fuser 命令显示访问某个文件的进程的PID. 。-k 是kill 访问这个文件的进程。 没有进程访问，就能够成功umount了。