linux下强行umount卸载挂载的设备

卸载挂载磁盘，结果出现无法卸载的情况

[root@localhost /]# umount /mnt/

umount: /mnt: device is busy

umount: /mnt: device is busy

使用umount -f，还是无法卸载

[root@localhost /]# umount -f /mnt/

umount2: Device or resource busy

umount: /mnt: device is busy

umount2: Device or resource busy

umount: /mnt: device is busy

1、先安装fuser命令

yum -y install psmisc

2、使用fuser命令，先确认有那些进程需要杀掉

[root@localhost /]# fuser -cu /mnt

/mnt: 15060c(root)

3、其次向进程发出SIGKILL信号

[root@localhost /]# fuser -ck /mnt

/mnt: 15060c

4、确认

[root@localhost /]# fuser -c /mnt

[1]+ Killed dd if=1g of=/dev/null bs=1M (wd: /mnt)

(wd now: /)