使用yum快速升级CentOS 6.5内核到 3.10.28
在yum的ELRepo源中，有mainline（3.13.1）、long-term（3.10.28）这2个内核版本，考虑到long-term更稳定，会长期更新，所以选择这个版本。
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 -ivh http://www.elrepo.org/elrepo-release-6-5.el6.elrepo.noarch.rpm
3、安装kernel-lt(lt=long-term) 长期支持版本 建议
- yum --enablerepo=elrepo-kernel install kernel-lt -y
或者安装kernel-ml(ml=mainline)
- yum --enablerepo=elrepo-kernel install kernel-ml -y
4、编辑grub.conf文件，修改Grub引导顺序
- vim /etc/grub.conf
- # grub.conf generated by anaconda
- #
- # Note that you do not have to rerun grub after making changes to this file
- # NOTICE: You do not have a /boot partition. This means that
- # all kernel and initrd paths are relative to /, eg.
- # root (hd0,0)
- # kernel /boot/vmlinuz-version ro root=/dev/sda1
- # initrd /boot/initrd-[generic-]version.img
- #boot=/dev/sda
- default=0
- timeout=5
- splashimage=(hd0,0)/boot/grub/splash.xpm.gz
- hiddenmenu
- title CentOS (3.10.28-1.el6.elrepo.x86_64)
- root (hd0,0)
- kernel /boot/vmlinuz-3.10.28-1.el6.elrepo.x86_64 ro root=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto LANG=en_US.UTF-8
- rd_NO_LVM rd_NO_DM rhgb quiet
- initrd /boot/initramfs-3.10.28-1.el6.elrepo.x86_64.img
- title CentOS (2.6.32-431.3.1.el6.x86_64)
- root (hd0,0)
- kernel /boot/vmlinuz-2.6.32-431.3.1.el6.x86_64 ro root=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto LANG=en_US.UTF-8 r
- d_NO_LVM rd_NO_DM rhgb quiet
- initrd /boot/initramfs-2.6.32-431.3.1.el6.x86_64.img
- title CentOS (2.6.32-431.el6.x86_64)
- root (hd0,0)
- kernel /boot/vmlinuz-2.6.32-431.el6.x86_64 ro root=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto LANG=zh_CN.UTF-8 rd_NO
- _LVM rd_NO_DM rhgb quiet
- 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CentOS 6.5 内核版本号
- [root@dev ~]# uname -r
- 3.10.28-1.el6.elrepo.x86_64
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