执行umount 命令的时候出现 device is busy ，有人在使用这块磁盘 umount /dev/sde1 umount: /u01/app/oracle: device is busy umount: /u01/app/oracle: device is busy 使用fuser 命令查看哪个进程在使用 [root@localhost ~]# fuser -m /u01/app/oracle/ /u01/app/oracle/: 2636c 2694c [root@localhost ~]# ps aux | grep 2636 root 2636 0.0 0.2 4532 1464 pts/1 S 09:56 0:00 bash root 2776 0.0 0.1 3916 696 pts/1 R+ 10:18 0:00 grep 2636 kill -9 干掉进程 [root@localhost ~]# kill -9 2636 [root@localhost ~]# umount /dev/sde1