Superblock last mount time is in the future.

由于调试关于系统时间程序的原因，更改了Ubuntu的系统时间，现在时间是2010年， 我在kde界面里更改时间为2009年。之后再起启动电脑的时候，就显示了一下错误：

Mount of filesystem failed
A maintenance shell will now be started
CONTROL-D will terminate this shell and re-try
是最上三行
在~#后按CONTROL-D后显示的是：
mountall start/sarting
fsck from util-linux-ng2.16
/dev/sda3: Superblock last mount time (Sun Feb 28 13:37:21 2010,now=Wed Dec 25 03:49:55 2002) is in the future.
/dev/sda3: unexpected inconsistency;run fsck manually.(i.e.,without -a or -p options)
……
……
……
……
mountall: filesystem has erroors: /
inint:mountall main process (767) terminated with status3
接着就是
Mount of filesystem failed
A maintenance shell will now be started
CONTROL-D will terminate this shell and re-try

这句话是关键：
/dev/sda3: Superblock last mount time (Sun Feb 28 13:37:21 2010,now=Wed Dec 25 03:49:55 2002) is in the future.
还有一句：
/dev/sda3: unexpected inconsistency;run fsck manually.

按CONTROL-D输入系统密码后进入Shell，
键入：fsck ；（文件系统检测）。

之后：reboot。
重启之后问题就解决了