linux中U盘umonut时出现“Device is busy”的解决方法

问题：

#umount /dev/sda1文章地址https://www.yii666.com/article/764197.html

umount: /mnt/usb: device is busy网址:yii666.com<文章来源地址:https://www.yii666.com/article/764197.html

查找占用目录进程：文章来源地址https://www.yii666.com/article/764197.html

#lsof |grep /mnt/usb

bash 1971 root cwd DIR 8,1 16384 1 /mnt/usb/
bash 2342 root 3r DIR 8,1 16384 1 /mnt/usb/

杀掉进程：网址:yii666.com

#kill -9 1971

#kill -9 2342

卸载：

#umount /mnt/usb