Q超越兔子的蜗牛O--逸云沙鸥Linux

飘飘何所似，天地一沙鸥;落霞与孤鹜齐飞，秋水共长天一色~~

日志

关于我

逸云沙鸥

不薄今人爱古文,潇洒自由过一生！好学深思千古事,勤劳善良专一心！

文章分类

Ubuntu Grub2 修复Grub2方法

2010-08-25 00:46:12| 分类： Ubuntu笔记 | 标签： |举报 |字号大中小订阅

下载LOFTER 我的照片书 |

Recover Grub 2 via LiveCD

First, grab a copy of the latest Ubuntu LiveCD and boot it.
Open a terminal and type

----------------------------------------quick recovery begin-----------------------
$ sudo fdisk -l
$ sudo mount /dev/sda1 /mnt ##注意使用你的 root分区所在的位置，也就是 / 所在的分区，可以使用 Ubuntu自带的磁盘实用工具查看
$ sudo mount /dev/sda2 /mnt/boot ##如果有专用的启动分区的话挂载它
$ sudo mount --bind /dev /mnt/dev #这3个比较必要，参数不用改
$ sudo mount --bind /proc /mnt/proc
$ sudo mount --bind /sys /mnt/sys
$ sudo chroot /mnt
# update-grub #已经是root了
# grub-install --recheck /dev/sda #一般一块硬盘的话，不用改了
# reboot #重启就可以了
--------------------------------quick end--------------------------

$ sudo fdisk -l

Now, you need to remember which device listed is your linux distribution, for reference, /dev/sda1 will be used. Now we need to mount the filesystem to /mnt

$ sudo mount /dev/sda1 /mnt

If you have /boot on a separate partition, that need's to be mounted aswell. For reference, /dev/sda2 will be used.

$ sudo mount /dev/sda2 /mnt/boot

If you have /var on a separate partition, that need's to be mounted aswell. For reference, /dev/sda3 will be used.

$ sudo mount /dev/sda3 /mnt/var Make sure you don't mix these up, pay attention to the output of FDISK

Now mount the rest of your devices and some other things needed in the chroot

$ sudo mount --bind /dev /mnt/dev
$ sudo mount --bind /proc /mnt/proc
$ sudo mount --bind /sys /mnt/sys

Now chroot into your system

$ sudo chroot /mnt

$ update-grub

You should be chroot'd into your system as root, you can now run commands as root, without the need for sudo.

Now you need to edit the /etc/default/grub file to fit your system

$ nano /etc/default/grub

When that is done you need to run update-grub to create the configuration file. If you have a separate /boot partition you need to mount it first!

$ update-grub

To install GRUB 2 to the MBR, next you need to run grub-install /dev/sda

$ grub-install /dev/sda

If you encounter any errors, try grub-install --recheck /dev/sda

$ grub-install --recheck /dev/sda

Press Ctrl+D to exit out of the chroot.
Once you exit back to your regular console, undo all the mounting, first the /dev and others

$ sudo umount /mnt/dev
$ sudo umount /mnt/sys
$ sudo umount /mnt/proc

Now you can unmount the root system. (But if you have a separate boot partition which you mounted earlier, you have to unmount this first, or you will get a "device busy" error message.)

$ sudo umount /mnt

And you should be free to restart your system right into GRUB 2 and then into your system installation.

If you had alternate OS entries, update-grub might say "Cannot find list of partitions!". Ignore it and continue - once you can boot into your linux installation, do so and then rerun update-grub and grub-install /dev/sda as root.

Restore GRUB2 - Recovering from a Windows XP / Vista / 7 Reinstallation

Fire up a terminal from the Live CD for Ubuntu 10.04.
$ sudo fdisk -l (Note the partition number on which Linux resides)
$ sudo mount /dev/sdaX /mnt (Replace X with the partition number housing Linux)
$ sudo grub-install --root-directory=/mnt/ /dev/sda
$ sudo update-grub
$ sudo reboot

Credits to
http://mundogeek.net/archivos/2009/12/08/recuperar-grub-2/ for the enlightening post &
http://www.webupd8.org/2009/12/how-to-recover-grub2-linux.html for the awesome translation.

重点推荐 Ubuntu Grub2 完全手册：https://help.ubuntu.com/community/Grub2#Reinstalling%20GRUB%202

评论这张

转发至微博

阅读(2662)| 评论(0)

历史上的今天

this.p={  m:2,
              b:2,
              loftPermalink:'',
              id:'fks_081071082081088068081084080095087083081068083080094069',
              blogTitle:'Ubuntu Grub2 修复Grub2方法',
              blogAbstract:'<span style=\"font-family: \'Helvetica Neue\', \'Lucida Grande\', Helvetica, Arial, Verdana, sans-serif; line-height: normal; font-size: 11.6667px;\"  \><ul id=\"pagelocation\"  style=\"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: rgb(109, 76, 7); font-size: 1.8em; font-weight: bold; line-height: 1.2em; border-bottom-width: 3px; border-bottom-style: solid; border-bottom-color: rgb(109, 76, 7);\"  \></ul\></span\>',
              blogTag:'grub2,ubuntu',
              blogUrl:'blog/static/35077686201072504612103',
              isPublished:1,
              istop:false,
              type:0,
              modifyTime:1316815806887,
              publishTime:1282668372103,
              permalink:'blog/static/35077686201072504612103',
              commentCount:0,
              mainCommentCount:0,
              recommendCount:0,
              bsrk:-100,
              publisherId:0,
              recomBlogHome:false,
              currentRecomBlog:false,
              attachmentsFileIds:[],
              vote:{},
              groupInfo:{},
              friendstatus:'none',
              followstatus:'unFollow',
              pubSucc:'',
              visitorProvince:'',
              visitorCity:'',
              visitorNewUser:false,
              postAddInfo:{},
              mset:'000',
              mcon:'',
              srk:-100,
              remindgoodnightblog:false,
              isBlackVisitor:false,
              isShowYodaoAd:true,
              hostIntro:'不薄今人爱古文,潇洒自由过一生！\n好学深思千古事,勤劳善良专一心！',
              hmcon:'1',
              selfRecomBlogCount:'0',
              lofter_single:'<iframe width="140" height="560" style="overflow:hidden;" src="http://www.lofter.com/mailEntry.do?blogad=1&blog" frameBorder="0"></iframe>'
            }

{list a as x}
    {if !!x}
    <div class="iblock nbw-fce nbw-f40">
      <a class="fc03 noul" target="_blank" hidefocus="true" href="http://blog.163.com/${x.visitorName}/">
      {if x.visitorName==visitor.userName}
      <img alt="${x.visitorNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.visitorName)}&r=${visitor.imageUpdateTime}"/>
      {else}
      <img alt="${x.visitorNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.visitorName)}"/>
      {/if}
      </a>
      <div class="cwd vname thide">
        {if x.moveFrom=='wap'}
          <a class="noul pnt" target="_blank" href="http://blog.163.com/services/wapblog.html?frompersonalbloghome"><span title="来自网易手机博客" class="iblock wapIcon"> </span></a>
        {elseif x.moveFrom=='iphone'}
          <a class="noul pnt" target="_blank"><span title="来自iPhone客户端" class="iblock iphoneIcon"> </span></a>
        {elseif x.moveFrom=='android'}
          <a class="noul pnt" target="_blank"><span title="来自Android客户端" class="iblock androidIcon"> </span></a>
        {elseif x.moveFrom=='mobile'}
          <a class="noul pnt" target="_blank" href="http://blog.163.com/services/emsblog.html?frompersonalbloghome"><span title="来自网易短信写博" class="iblock wapIcon"> </span></a>
        {/if}
        <a class="fc03 m2a"  target="_blank" hidefocus="true" href="http://blog.163.com/${x.visitorName}/">
          ${fn(x.visitorNickname,8)|escape}
        </a>
      </div>
    </div>
    {/if}
    {/list}

<#--最新日志，群博日志--> <#--推荐日志-->

<p class="fc06">推荐过这篇日志的人：</p>
    <div>
      {list a as x}
      {if !!x}
      <div class="iblock nbw-fce nbw-f40">
        <a class="fc03 noul" target="_blank" hidefocus="true" href="http://blog.163.com/${x.recommenderName}/">
        <img alt="${x.recommenderNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.recommenderName)}"/>
        </a>
        <div class="cwd thide">
          <a class="fc03 m2a" target="_blank" hidefocus="true" href="http://blog.163.com/${x.recommenderName}/">
            ${fn(x.recommenderNickname,6)|escape}
          </a>
        </div>
      </div>
      {/if}
      {/list}
    </div>
    {if !!b&&b.length>0}
    <p  class="fc06">他们还推荐了：</p>
    <ul>
    {list b as y}
      {if !!y}
        <li class="rrb"><span class="iblock">·</span><a class="fc03 m2a" target="_blank" href="http://blog.163.com/${y.recommendBlogPermalink}/?from=blog/static/35077686201072504612103">${y.recommendBlogTitle|escape}</a></li>
      {/if}
    {/list}
    </ul>
    {/if}

<#--引用记录--> <#--博主推荐--> <#--随机阅读--> <#--首页推荐--> <#--历史上的今天--> <#--被推荐日志--> <#--上一篇，下一篇--> <#-- 热度 -->

{list a as x}
    {if !!x}
    <div class="hotItem iblock nbw-fce nbw-f40">
      <a class="fc03 noul" target="_blank" hidefocus="true" href="http://blog.163.com/${x.publisherUsername}/">
      {if x.publisherUsername==visitor.userName}
      <img alt="${x.publisherNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.publisherUsername)}&r=${visitor.imageUpdateTime}"/>
      {else}
      <img alt="${x.publisherNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.publisherUsername)}"/>
      {/if}
      </a>
      <div class="cwd vname thide">
        <a class="fc03 m2a"  target="_blank" hidefocus="true" href="http://blog.163.com/${x.publisherUsername}/">
          ${fn(x.publisherNickname,8)|escape}
        </a>
      </div>
      <a class="f-myLikeIcons hottype {if x.type==1} js-liketype{elseif x.type==2} js-reblogtype{elseif x.type==3} js-sharetype{else}{/if}" target="_blank" hidefocus="true" href="http://blog.163.com/${x.publisherUsername}/"> </a>
    </div>
    {/if}
    {/list}

<#-- 网易新闻广告 --> <#--右边模块结构--> <#--评论模块结构--> <#--引用模块结构--> <#--博主发起的投票-->

页脚

我的照片书 - 手机博客 - 下载LOFTER APP - 订阅此博客

Q超越兔子的蜗牛O--逸云沙鸥Linux

导航

日志

Ubuntu Grub2 修复Grub2方法

Recover Grub 2 via LiveCD

Restore GRUB2 - Recovering from a Windows XP / Vista / 7 Reinstallation

历史上的今天

最近读者

热度

评论

页脚