解决"authentication token manipulation error"

   昨天安装是Ubuntu Server. 配置好了几个软件后就忘记继续了...今天打开,居然忘记了密码...真是的..
  后来还是要改了. 不想重新弄什么的了..百度了下怎么改密码...然后就有一篇文章说是在进入系统前进入高级模式..然后里面有root的单用户模式..-----kohna,

1).在启动项选择:Advaned options for Ubuntu. 
2).然后 选择:Ubuntu ,with Linux 3.13.0-24-generic (recovery mode),
3). 等待加载完成..你将看到"Recovery Menu (filesystem state :read-only)"
4).选择root              Drop to root shell prompt 就会进入单用户模式了..

然后是修改密码.
输入passwd user,回车后就出现 
 authentication token manipulation error.
passwd unchanged..

接下来我就在不断的尝试....
找了很多文章看...CSDN,网易的什么都有

后来找到了一篇外国人写的... 
 http://linhost.info/2013/08/passwd-authentication-token-manipulation-error-ubuntu/

You probably encountered this error while trying to reset the password on a Ubuntu system.

 root@u13-04:~# passwd nyuser 
 Enter new UNIX password: 
 Retype new UNIX password: 
 passwd: Authentication token manipulation error 
 passwd: password unchanged

 

This is the result of trying to work on a file system while mounted as read-only. The solution is a simple one. Before making changes to the users password mount the filesystem as read-write which allows for the necessary changes to be made.
 

mount -o rw,remount /

Now try to change the users passwords again.

root@u13-04:~# passwd nyuser Enter new UNIX password: 
Retype new UNIX password: 
passwd: password updated successfully

 
关键代码是:mount -o rw,remount / .
输入后就可以改了..注意..输入后什么也不会提示.
      来自kohna.

 2014-05-20-0:28