关于umount命令的问题

[ryt]

有时候常常会出现umount不成功的情况，这是怎么回事？

遇到这种情况该怎么办呢？

[astolia]

有程序正在使用，用

代码： 全选

sudo lsof 挂载点

查看，退出相应程序

[googleray]

试试这个。

代码： 全选

umount -l /device

[poloshiao]

http://manpages.ubuntu.com/manpages/uto ... unt.8.html
umount - unmount file systems

it will fail in case this device was mounted on more than one directory.

Note that a file system cannot be unmounted when it is 'busy' - for
example, when there are open files on it, or when some process has its
working directory there, or when a swap file on it is in use. The
offending process could even be umount itself - it opens libc, and libc
in its turn may open for example locale files. A lazy unmount avoids
this problem.

-f, --force
Force an unmount (in case of an unreachable NFS system).
(Requires kernel 2.1.116 or later.)

-l, --lazy
Lazy unmount. Detach the filesystem from the file hierarchy
now, and clean up all references to this filesystem as soon as
it is not busy anymore. (Requires kernel 2.4.11 or later.)

-v, --verbose
Verbose mode.