[root@localhost /]# umount /home
umount: /home device is busy
使用umount -f,问题依旧
[root@localhost /]# umount -f /home
umount2: Device or resource busy
umount: /home: device is busy
使用fuser命令,先确认有那些进程需要杀掉
[root@localhost /]# fuser -cu /home
/home: 15060c(root)
其次向进程发出SIGKILL信号
[root@localhost /]# fuser -ck /home
/home: 15060c
确认
[root@localhost /]# fuser -c /home
[1]+ Killed dd if=1g of=/dev/null bs=1M (wd: /home)
(wd now: /)