CentOS 下yum快速升级内核

1、导入public key

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

2、安装ELRepo到CentOS 6.6中

1	rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

3、安装长期支持版本

1	yum --enablerepo=elrepo-kernel install kernel-lt -y

4、编辑grub.conf文件，修改Grub引导顺序

1	vim /etc/grub.conf

确认刚刚安装的内核的位置，然后将default修改一下。

Vim

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# 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/mapper/vg_have-lv_root # initrd /initrd-[generic-]version.img #boot=/dev/xvda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (3.10.63-1.el6.elrepo.x86_64) root (hd0,0) kernel /vmlinuz-3.10.63-1.el6.elrepo.x86_64 ro root=/dev/mapper/vg_have-lv_root rd_LVM_LV=vg_have/lv_root rd_LVM_LV=vg_have/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us console=hvc0 crashkernel=auto rhgb quiet initrd /initramfs-3.10.63-1.el6.elrepo.x86_64.img title CentOS (2.6.32-504.3.3.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-504.3.3.el6.x86_64 ro root=/dev/mapper/vg_have-lv_root rd_LVM_LV=vg_have/lv_root rd_LVM_LV=vg_have/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us console=hvc0 crashkernel=auto rhgb quiet initrd /initramfs-2.6.32-504.3.3.el6.x86_64.img title CentOS (2.6.32-358.6.1.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-358.6.1.el6.x86_64 ro root=/dev/mapper/vg_have-lv_root rd_LVM_LV=vg_have/lv_root rd_LVM_LV=vg_have/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us console=hvc0 crashkernel=auto rhgb quiet initrd /initramfs-2.6.32-358.6.1.el6.x86_64.img title CentOS (2.6.32-220.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-220.el6.x86_64 ro root=/dev/mapper/vg_have-lv_root rd_LVM_LV=vg_have/lv_root rd_LVM_LV=vg_have/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us console=hvc0 crashkernel=auto rhgb quiet initrd /initramfs-2.6.32-220.el6.x86_64.img title CentOS (2.6.32-131.0.15.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-131.0.15.el6.x86_64 ro root=/dev/mapper/vg_have-lv_root rd_LVM_LV=vg_have/lv_root rd_LVM_LV=vg_have/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us console=hvc0 crashkernel=auto rhgb quiet initrd /initramfs-2.6.32-131.0.15.el6.x86_64.img

新装的内核位置为0，所以讲default修改为0，保存退出重启。

5、检查内核

1 2	[root@MyServer ~]# uname -r 3.10.63-1.el6.elrepo.x86_64