CentOS6上新增硬盤並安裝配置grub文件
實例:
為運行於虛擬機上的CentOS 6添加一塊新硬件,提供兩個主分區;
(1) 為硬盤新建兩個主分區;並為其安裝grub;
(2) 為硬盤的第一個主分區提供內核和ramdisk文件; 為第二個分區提供rootfs;
(3) 為rootfs提供bash、ls、cat程序及所依賴的庫文件;
(4) 為grub提供配置文件;
(5) 將新的硬盤設置為第一啟動項並能夠正常啟動目標主機;
新增硬盤並分區
[[email protected]~]# fdisk -l /dev/sdb
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280bytes
Sector size (logical/physical): 512 bytes /512 bytes
I/O size (minimum/optimal): 512 bytes / 512bytes
Disk identifier: 0x6a3c778b
Device Boot Start End Blocks Id System
/dev/sdb1 1 132 1060258+ 83 Linux
/dev/sdb2 133 264 1060290 83 Linux
創建文件系統
[[email protected]~]# mke2fs -t ext4 /dev/sdb1
[[email protected]~]# mke2fs -t ext4 /dev/sdb2
掛載
[[email protected]~]# mkdir /mnt/boot
[[email protected]~]# mount /dev/sdb1 /mnt/boot
安裝grub至分區1上
[[email protected]~]# grub-install --root-directory=/mnt /dev/sdb
Probing devices to guess BIOS drives. Thismay take a long time.
Installation finished. No error reported.
This is the contents of the device map/mnt/boot/grub/device.map.
Check if this is correct or not. If any ofthe lines is incorrect,
fix it and re-run the script`grub-install‘.
復制內核文件和initrdfs文件
[[email protected]]# cp /boot/vmlinuz-2.6.32-431.el6.x86_64 /mnt/boot/vmlinuz
[[email protected]]# cp /boot/initramfs-2.6.32-431.el6.x86_64.img /mnt/boot/initramfs
創建grub配置文件
[[email protected]]# vim /mnt/boot/grub//grub.conf
default=0
timeout=5
title CentOS6(test)
root (hd0,0)
kernel /vmlinuz ro root=/dev/sdb2 selinux=0init=/bin/bash
initrd /initramfs
卸載sdb1,掛載sdb2,並創建rootfs相關目錄
[[email protected] /]# umount /dev/sdb1
[[email protected] /]# mount /dev/sdb2 /mnt
[[email protected] /]# mkdir -p/mnt/{bin,sbin,lib,lib64,etc,home,root,media,dev,mnt,tmp}
[[email protected] /]# mkdir -p/mnt/{usr/{bin,sbin,lib,lib64},var/{lib,lib64,log,local,cache
},proc,sys,selinux}
為rootfs提供bash、ls、cat程序及所依賴的庫文件;
cp /bin/{bash,ls,cat} /mnt/bin
ldd命令: #需要ldd命令
- print shared library dependencies
ldd [OPTION]... FILE...
[[email protected]/]# cp `ldd /bin/{bash,ls,cat}|grep -Eo "/lib.*[[:space:]]"| sort -u`/mnt
/lib64
[[email protected] /]# sync #同步到磁盤
重啟後調整硬盤啟動順序測試
調整虛擬機bios硬盤開機啟動項
啟動後讀取自定義的grub.conf
正常啟動
本文出自 “11290766” 博客,請務必保留此出處http://rylan.blog.51cto.com/11290766/1922542
CentOS6上新增硬盤並安裝配置grub文件