使用yum快速升级CentOS 6.5内核到 3.10.28

1、导入public key

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

2、安装ELRepo到CentOS-6.5中

rpm-ivhhttp://www.elrepo.org/elrepo-release-6-5.el6.elrepo.noarch.rpm

3、安装 kernel-lt（lt=long-term）

yum--enablerepo=elrepo-kernelinstallkernel-lt-y

或者安装kernel-ml（ml=mainline）

yum--enablerepo=elrepo-kernelinstallkernel-ml-y

4、编辑grub.conf文件，修改Grub引导顺序

vim/etc/grub.conf
#grub.confgeneratedbyanaconda
#
#Notethatyoudonothavetorerungrubaftermakingchangestothisfile
#NOTICE:Youdonothavea/bootpartition.Thismeansthat
#allkernelandinitrdpathsarerelativeto/,eg.
#root(hd0,0)
#kernel/boot/vmlinuz-versionroroot=/dev/sda1
#initrd/boot/initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
hiddenmenu
titleCentOS(3.10.28-1.el6.elrepo.x86_64)
root(hd0,0)
kernel/boot/vmlinuz-3.10.28-1.el6.elrepo.x86_64roroot=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613rd_NO_LUKSKEYBOARDTYPE=pcKEYTABLE=usrd_NO_MDcrashkernel=autoLANG=en_US.UTF-8
rd_NO_LVMrd_NO_DMrhgbquiet
initrd/boot/initramfs-3.10.28-1.el6.elrepo.x86_64.img
titleCentOS(2.6.32-431.3.1.el6.x86_64)
root(hd0,0)
kernel/boot/vmlinuz-2.6.32-431.3.1.el6.x86_64roroot=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613rd_NO_LUKSKEYBOARDTYPE=pcKEYTABLE=usrd_NO_MDcrashkernel=autoLANG=en_US.UTF-8r
d_NO_LVMrd_NO_DMrhgbquiet
initrd/boot/initramfs-2.6.32-431.3.1.el6.x86_64.img
titleCentOS(2.6.32-431.el6.x86_64)

root(hd0,0)
kernel/boot/vmlinuz-2.6.32-431.el6.x86_64roroot=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613rd_NO_LUKSKEYBOARDTYPE=pcKEYTABLE=usrd_NO_MDcrashkernel=autoLANG=zh_CN.UTF-8rd_NO
_LVMrd_NO_DMrhgbquiet
initrd/boot/initramfs-2.6.32-431.el6.x86_64.img

确认刚安装好的内核在哪个位置，然后设置default值（从0开始），一般新安装的内核在第一个位置，所以设置default=0。

5、重启，查看内核版本号

[root@dev ~]#

uname-r

3.10.28-1.el6.elrepo.x86_64