Cent OS 密码恢复

五月 11th, 2010 Posted in Centos | 阅读次数: 689 次

Author:gaojinbo

Time:2010-5-11

很多时候忘记了系统密码，或是密码记录在一个文件里面没办法登录系统，按照以下方法便能很容易的重置root密码。 此方法适合所有centos/rhel系统，linux root密码恢复

 

Cent OS密码恢复的具体方法.(注:设置了GRUB密码此方法不适用)

1.开机后进入GRUB画面如下图所示:

image

 

2.输入"E"编辑内核行。然后便可看到如下图所示的屏幕:

image

 

3.用箭头键选中 kernel 开始的行，按"E"键编辑内核参数。到达如下图所示的屏幕时,按图中所示,在参数后面加1就可以进入单用户模式进行密码恢复：

image

 

4.按"Enter" 回到GRUB介面,然后按"B"键,引导系统，内核会启动到单用户模式。运行 passwd 命令，更改用户根密码：

sh-3.00# passwd
New UNIX password:
Retype new UNIX password:
passwd: all authentication tokens updated successfully

此时密码已经成功恢复,重启后,就可以用新的密码进行登录了

 

完成！

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This entry was posted on 星期二, 五月 11th, 2010 at 15:45 and is filed under Centos. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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