在我们进行远程文件操作的时候，我们经常会出现文件服务出现卸载掉哦情况。例如

umount /mnt/net1
umount: /mnt/net1: device is busy.
??????? (In some cases useful info about processes that use
???????? the device is found by?lsof(8) or fuser(1))

这种问题解决方案:

一、查找使用这个文件的进程和命令，具体的操作代码

[[email?protected] ~]# lsof |grep /mnt/net1
lsof: WARNING: can‘t stat() cifs file system /mnt/net1
????? Output information may be incomplete.
bash????? 18841????? root? cwd?? unknown??????????????????????????????????????????? /mnt/net1/TDDOWNLOAD/软件 (stat: No such device)

二、然后执行ps命令可以查找执行此进程的命令

[[email?protected] ~]# ps -ef|grep 18841
root???? 18841 18839? 0 Nov29 pts/2??? 00:00:00 /bin/bash -l
root???? 29496 25604? 0 16:26 pts/0??? 00:00:00 grep 18841

三、强行结束无关进程

[[email?protected] ~]# kill -9 18841

四、然后卸载相关挂载

[[email?protected] ~]# umount /mnt/net1

五、然后可以在功过mount命令进行查看。