卸载出现问题:
root@empty sa]# umount /opt/database
umount: /opt/database: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
解决方法:
1)使用fuser定位到进程
fuser -m /opt/database
/opt/database: 2505c 2521c 2529c 2587c 2588c 2640c
2)kill掉
kill 2521 2529
3)重新umount