找回丢失的root密码

2009-12-20 13:45| 发布者: admin| 查看: 67| 评论: 0|原作者: 九天玄女

找回丢失的root密码
工作中有可能会丢失或者忘记root的密码，不过不要紧，我来告诉大家一种修改root密码的方法：
启动系统到如下的选择操作系统的界面：

screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://blogimg.chinaunix.net/blog/upfile2/081218100645.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

按下任意键（不包括Enter回车键）进入GRUB界面：

screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://blogimg.chinaunix.net/blog/upfile2/081218100704.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

按下e键（grub没有设置密码，如有需要输入p键，再输入密码回车即可），进入如下界面：

screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://blogimg.chinaunix.net/blog/upfile2/081218100717.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

用上下键选择到kernel这一行，按下e键，进入kernel这一行的修改界面：

screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://blogimg.chinaunix.net/blog/upfile2/081218100731.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

再按下e键，在这一行的末尾加入 single （系统单用户模式），并回车，

screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://blogimg.chinaunix.net/blog/upfile2/081218100744.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

返回上一级菜单，按下 b 键，重新引导内核，

screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://blogimg.chinaunix.net/blog/upfile2/081218100801.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

进入单用户模式，如下图所示，

screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://blogimg.chinaunix.net/blog/upfile2/081218101104.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

用passwd 修改root密码：passwd root ，输入两次新密码即可完成密码的修改，

screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://blogimg.chinaunix.net/blog/upfile2/081218101203.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

用reboot命令重启系统，就可以用新的密码进入系统了。root密码修改完成。

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找回丢失的root密码

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