卸载目录报错

[root@localhost ~]# umount /usr/geoc
umount.nfs4: /usr/geoc: device is busy

法一：fuser -m -v /data_nas/
USER PID ACCESS COMMAND
as: root kernel mount /mnt
root 7088 ..c.. bash
admin 7145 ..c.. bash

#法二

umount -l /data_nas

#法三

fuser -km /data_nas

 

 

解决：

推荐法一