umount不了磁盘或者网络设备
比如umount不了/g01/app/shared
[[email protected] shared]# umount /g01/app/shared
umount.nfs: /g01/app/shared: device is busy
umount: /g01/app/shared: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
umount.nfs: /g01/app/shared: device is busy此时你当然可以用-l强制umount，
umount -l /g01/app/shared但是有方法可以查谁在使用这个设备，方法很简单
fuser
[root@rac01 shared]# fuser -u /g01/app/shared
/g01/app/shared: 1520c(root)
[root@rac01 shared]# ps axu|grep 1520
root 1520 0.0 0.0 108468 1912 pts/0 S 09:00 0:00 bash
root 1630 0.0 0.0 103256 840 pts/0 S+ 09:09 0:00 grep 1520
之后ps查一下进程，发现是bash进程在占用，退出目录然后umount就ok了。
时间： 2024-10-09 18:44:33