linux root密码忘记了，如何找回来？

<span style="color: rgb(0, 0, 0); font-family: Tahoma, 'Microsoft Yahei', Simsun; font-size: 14px; line-height: 25px;">&nbsp; &nbsp;好久没有玩LINUX了，今天小编公司的服务器挂了，就进去看看，可恶的是小编忘记了公司服务器的密码了，还是LINUX的呢，麻烦出来了，怎么办呢？小编就研究了一下，一个早上才知道怎么找回来，下面就介绍到3种方法可以找回来的，具体如下：</span> <div style="word-wrap: break-word; color: rgb(0, 0, 0); font-family: Tahoma, 'Microsoft Yahei', Simsun; font-size: 14px; line-height: 25px;"> <p style="word-wrap: break-word; margin: 0px; padding: 0px;"><a href="http://www.zhishiwu.com/plugin.php?id=iplus_seolinks:links&amp;url=ZGF0YS9hdHRhY2htZW50L3BvcnRhbC8yMDE0MDIvMjYvMjE1NDIyazN4cWM3N2V4NHBlcWlweS5wbmc=" style="word-wrap: break-word; color: rgb(51, 51, 51); text-decoration: none;" target="_blank"><img src=http://www.zhishiwu.com/uploadfile/2014/0302/20140302041449392.png" style="word-wrap: break-word; border: none; max-width: 620px;" /></a></p> <div style="word-wrap: break-word;"> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;"><strong style="word-wrap: break-word; margin: 0px; padding: 0px;">linux root密码找回方法一</strong></p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第1步：用grub引导系统时：在出现grub画面时，用上下键选中你平时启动linux的那一项(别选dos哟)，然后按e键</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第2步：再次用上下键选中你平时启动linux的那一项(类似于kernel /boot/vmlinuz-2.4.18-14 ro root=LABEL=/)，然后按e键</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第3步：修改你现在见到的命令行，加入single，结果如下：</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　kernel /boot/vmlinuz-2.4.18-14 single ro root=LABEL=/ single</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第4步：回车返回，然后按b键启动，即可直接进入linux命令行.</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第5步：使用以下命令&ldquo;vi /etc/shadow&rdquo;将第一行，即以root开头的一行中root:后和下一个:前的内容删除，第一行将类似于root::......保存</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　vi /etc/shadow</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第6步：reboot重启，root密码为空。</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">&nbsp;</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;"><strong style="word-wrap: break-word; margin: 0px; padding: 0px;">linux root密码找回方法二</strong></p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第1步：在系统进入单用户状态，直接用passwd root去更改。</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第2步：用安装光盘引导系统，进行linux rescue状态，将原来/分区挂接上来,作法如下：</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　cd /mnt mkdir hd mount -t auto /dev/hdaX(原来/分区所在的分区号) hd cd hd chroot ./ passwd root</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">&nbsp;</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;"><strong style="word-wrap: break-word; margin: 0px; padding: 0px;">linux root密码找回方法三</strong></p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第1步：在系统进入单用户状态，直接用passwd root去更改。</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第2步：用安装光盘引导系统，进行linux rescue状态，将原来/分区挂接上来,作法如下：</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　cd /mnt mkdir hd mount -t auto /dev/hdaX(原来/分区所在的分区号) hd cd hd chroot ./ passwd root</p> <p style="word-wrap: break-word; margin: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: Verdana, Arial, Helvetica, sans-serif; line-height: 24px;">　　

第3步：将本机的硬盘拿下来，挂到其他的linux系统上，</p> </div> </div> <br />