RedHat AS4 U4 kernel-2.6.9-42 升级
	[root@www ~]# uname -ra
	Linux www 2.6.9-5.ELsmp #1 SMP Wed Jan 5 19:30:39 EST 2005 i686 i686 i386 GNU/Linux
做Oracle rac 10g
	ocfs2-2.6.9-42.EL-1.2.4-2.i686.rpm 要求内核为 2.6.9-42.EL (找不到 2.6.9-42.ELsmp 的内核升级rpm所以只好找个EL的应付一下 )
	 
	先在网上找到 kernel-2.6.9-42.EL.i686.rpm,mkinitrd-4.2.1.6-1.i386.rpm 这两个rpm。
	
	1、更新 mkinitrd
	删除 mkinitrd-4.1.18
	[root@www oracle]# rpm -e --nodeps mkinitrd-4.1.18-2
	安装 mkinitrd-4.2.1.6
	 
	[root@www oracle]# rpm -ivh mkinitrd-4.2.1.6-1.i386.rpm
	warning: mkinitrd-4.2.1.6-1.i386.rpm: V3 DSA signature: NOKEY, key ID 443e1821
	Preparing...                ###################### [100%]
	1:mkinitrd               #################### [100%]
	 
	2、安装    kernel-2.6.9-42.EL 内核
	备份 /boot
	[root@www ~]# cp -R /boot /boot.old
	[root@www oracle]# rpm -ivh kernel-2.6.9-42.EL.i686.rpm
	warning: kernel-2.6.9-42.EL.i686.rpm: V3 DSA signature: NOKEY, key ID a7048f8d
	Preparing...                ###################### [100%]
	1:kernel                 ######################## [100%]
	 
3、编辑 grub.conf
	[root@www oracle]# cd /boot/grub 
	 
	[root@www grub]# vi grub.conf
	# 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=1
	default=0
	timeout=20
	splashimage=(hd0,0)/grub/splash.xpm.gz
	hiddenmenu
	title Red Hat Enterprise Linux AS (2.6.9-42.EL)
	root (hd0,0)
	kernel /vmlinuz-2.6.9-42.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet
	initrd /initrd-2.6.9-42.EL.img
	title Red Hat Enterprise Linux AS (2.6.9-5.ELsmp)
	root (hd0,0)
	kernel /vmlinuz-2.6.9-5.ELsmp ro root=/dev/VolGroup00/LogVol00 rhgb quiet
	initrd /initrd-2.6.9-5.ELsmp.img
	title Red Hat Enterprise Linux AS-up (2.6.9-5.EL)
	root (hd0,0)
	kernel /vmlinuz-2.6.9-5.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet
	initrd /initrd-2.6.9-5.EL.img
	~
	
	重启系统 reboot。

