root@ali-bakserver:~# umount /home/opt/log/112.16.4.10_LB2
umount.nfs: /home/opt/log/112.16.4.10_LB2: device is busy
umount.nfs: /home/opt/log/112.16.4.10_LB2: device is busy
root@ali-bakserver:~# umount -f /home/opt/log/112.16.4.10_LB2 #加-f参数，多试几次即可成功卸载
本文出自 “青春邓勇” 博客，请务必保留此出处http://dengyong.blog.51cto.com/8409869/1857675
原文：http://dengyong.blog.51cto.com/8409869/1857675