Linux 下使用umount强行卸载设备

卸载NFS，结果出现无法卸载的情况

 [root@localhost /]# umount /udisk/
 umount: /udisk: device is busy
 umount: /udisk: device is busy

使用umount -f，问题依旧

 [root@localhost /]# umount -f /udisk
 umount2: Device or resource busy
 umount: /udisk: device is busy
 umount2: Device or resource busy
 umount: /udisk: device is busy

使用fuser命令，先确认有那些进程需要杀掉

 [root@localhost /]# fuser -cu /udisk
 /udisk:                15060c(root)

其次向进程发出SIGKILL信号

 [root@localhost /]# fuser -ck /udisk
 /udisk:                15060c