CentOS恢复被删除的boot分区
时间:2015-06-18 12:31 来源:linux.it.net.cn 作者:IT
SSH Secure Shell 3.2.9 (Build 283)
Copyright (c) 2000-2003 SSH Communications Security Corp -
http:
//www
.
ssh
.com/
This copy of SSH Secure Shell is a non-commercial version.
This version does not include PKI and PKCS
#11 functionality.
[root@localhost ~]
# cd /boot //进入/boot分区
[root@localhost boot]
# ls //查看boot分区的内容
config-2.6.32-71.el6.i686 symvers-2.6.32-71.el6.i686.gz
grub System.map-2.6.32-71.el6.i686
initramfs-2.6.32-71.el6.i686.img vmlinuz-2.6.32-71.el6.i686
[root@localhost boot]
# cd 。。//返回上层目录
[root@localhost /]
# rm -rf /boot/*//删除/boot分区所有内容
[root@localhost /]
# ls /boot//查看/boot分区内容为空
[root@localhost /]
# mount /dev/sr0 /mnt//挂载cdrom设备到/mnt目录下
mount
: block device
/dev/sr0
is write-protected, mounting
read
-only
[root@localhost /]
# rpm -ivh /mnt/Packages/kernel-2.6.32-71.el6.i686.rpm
--root=/ --
Preparing.。。
########################################### [100%]
1:kernel
########################################### [100%]
[root@localhost /]
# ls /boot //查看/boot分区内容
config-2.6.32-71.el6.i686 System.map-2.6.32-71.el6.i686
initramfs-2.6.32-71.el6.i686.img vmlinuz-2.6.32-71.el6.i686
symvers-2.6.32-71.el6.i686.gz
[root@localhost /]
# mkdir /boot/grub//在/boot目录新建一个grub目录
[root@localhost /]
# touch /boot/grub/grub.conf//新建一个grub.conf配置文件
[root@localhost /]
# cp -rf /usr/share/grub/i386-pc/* /boot/grub/
//
[root@localhost /]
# ls /boot//查看/boot分区内容
config-2.6.32-71.el6.i686 symvers-2.6.32-71.el6.i686.gz
grub System.map-2.6.32-71.el6.i686
initramfs-2.6.32-71.el6.i686.img vmlinuz-2.6.32-71.el6.i686
[root@localhost /]
# ls /boot/grub/ //查看/boot/grub目录内容
e2fs_stage1_5 iso9660_stage1_5 stage1 vstafs_stage1_5
fat_stage1_5 jfs_stage1_5 stage2 xfs_stage1_5
ffs_stage1_5 minix_stage1_5 stage2_eltorito
grub.conf reiserfs_stage1_5 ufs2_stage1_5
[root@localhost /]
# fdisk -l //查看分区
Disk
/dev/sda
: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors
/track
, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical
/physical
): 512 bytes / 512 bytes
I
/O
size (minimum
/optimal
): 512 bytes / 512 bytes
Disk identifier: 0x000b1db4
Device Boot Start End Blocks Id System
/dev/sda1
* 1 13 102400 83 Linux
//
这个为
/boot
启动分区
Partition 1 does not end on cylinder boundary.
/dev/sda2
13 144 1048576 82 Linux swap / Solaris
Partition 2 does not end on cylinder boundary.
/dev/sda3
144 2611 19819520 83 Linux
//
这个为/根分区
[root@localhost /]
# mount//查看所有挂载分区
/dev/sda3
on /
type
ext4 (rw)
//
根分区
/dev/sda1
on
/boot
type
ext4 (rw)
//boot
分区为sda1
devpts on
/dev/pts
type
devpts (rw)
tmpfs on
/dev/shm
type
tmpfs (rw)
proc on
/proc
type
proc (rw)
sysfs on
/sys
type
sysfs (rw)
/dev/sr0
on
/mnt
type
iso9660 (ro)
[root@localhost /]
# grub//启动grub
Probing devices to guess BIOS drives. This may take a long
time
.
GNU GRUB version 0.97 (640K lower / 3072K upper memory)
[ Minimal BASH-like line editing is supported. For the first word, TAB
lists possible
command
completions. Anywhere
else
TAB lists the
possible
completions of a device
/filename
.]
grub》 root (hd0,0)
//
首先
find
/grub/stage1
查看
/boot
分区为(hd0,0)
root (hd0,0)
//
设置
/boot
分区为
/dev/sda1
Filesystem
type
is ext2fs, partition
type
0x83
grub》 setup (hd0)
//
重新安装grub
setup (hd0)
Checking
if
“
/boot/grub/stage1
” exists.。。 no
Checking
if
“
/grub/stage1
” exists.。。
yes
Checking
if
“
/grub/stage2
” exists.。。
yes
Checking
if
“
/grub/e2fs_stage1_5
” exists.。。
yes
Running “embed
/grub/e2fs_stage1_5
(hd0)”。。。 26 sectors are embedded.
succeeded
Running “
install
/grub/stage1
(hd0) (hd0)1+26 p (hd0,0)
/grub/stage2
/grub/grub
.conf”。。。 succeeded
Done.
grub》 quit
//
退出
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