linux下取消掛載時報xxxxdevice is busy

報錯現象;

取消使用umount /u01/mount/會出現

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))

解決辦法：

這時fuser命令就有派上用場了：

fuser -km /u01/mount/

/u01/mount: 29850c

fuser 命令顯示訪問某個文件的進程的PID. 。-k 是kill 訪問這個文件的進程。 沒有進程訪問，就能夠成功umount了。