分类: LINUX
2008-12-18 18:11:02
Grub文件丢失的修复方法
1. 我系统备份的grub.conf文件配置信息如下,本次故障机有自己独立的/boot分区,以下步骤中使用的参数要视你具体的内核版本确定;
# grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00 # initrd /initrd-version.img #boot=/dev/sda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title Red Hat Enterprise Linux Server (2.6.18-53.el5PAE) root (hd0,0) kernel /vmlinuz-2.6.18-53.el5PAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-2.6.18-53.el5PAE.img title Red Hat Enterprise Linux Server with RAID1 (2.6.18-53.el5PAE) root (hd0,0) kernel /vmlinuz-2.6.18-53.el5PAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-raid1-2.6.18-53.el5PAE.img title Red Hat Enterprise Linux Server (2.6.18-53.el5) root (hd0,0) kernel /vmlinuz-2.6.18-53.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-2.6.18-53.el5.img |
2. 某日系统被破坏,grub.conf文件损坏,不能正常启动系统,启动时进入grub提示状态:
注意:以下grub环境可以使用Tab键补全哟!
grub>
3. 设置grub的根设备为linux内核所在分区,因为我的/boot分区安装在第一块硬盘的第一个分区,所以设置为(hd0,0),注意这里是不区分IDC硬盘与SCSI硬盘的!
grub> root (hd0,0)
4. 设置内核参数,加载内核文件,因为我是安装的独立的/boot分区,如果/boot分区是放在/分区下面,则内核文件要指定为/boot/vmlinuz-verstion!
grub>kernel /vmlinuz-2.6.18-53.el5PAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet
5. 加载内核镜像文件
grub> initrd /initrd-2.6.18-53.el5PAE.img
6. 引导系统
grub>boot
7. 进入系统后,修复或者创建新的/boot/grub/grub.conf文件,确保系统下次能够正常启动;
8.grub.conf配置文件常见参数解释:
待续…