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使用yum快速升级CentOS 6.5内核到 3.10.28(CentOS6.6\7方法一致)

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)

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