centos umount 卸载出错

target is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))

解决

fuser -m -v -i -k /home/wwwroot/

在重新卸载
umount /home/wwwroot/

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原文地址：https://www.cnblogs.com/buxiangxin/p/8617917.html