- ##记得切换到root用户执行升级操作.
- [root@localhost ~]# uname -a ##旧版
- Linux localhost.localdomain 2.6.32-279.el6.i686 #1 SMP Fri Jun 22 10:59:55 UTC 2012 i686 i686 i386 GNU/Linux
- [root@localhost ~]# rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
- [root@localhost ~]# rpm -ivh https://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm
- [root@localhost ~]# yum --enablerepo=elrepo-kernel install kernel-lt -y ##此步会有点慢
- [root@localhost ~]# vim /etc/grub.conf default=1 改为 default=0 ##设置默认以3.10核心启动，默认是按照旧的核心启动
- [root@localhost ~]# reboot
- [root@localhost ~]# uname -a ##升级后的版本
- Linux localhost.localdomain 3.10.104-1.el6.elrepo.i686 #1 SMP Fri Oct 21 09:11:59 EDT 2016 i686 i686 i386 GNU/Linux
网上有很多操作案例都失效的。
上面方法适用于centos6,如果是centos7则rpm文件替换为https://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
2、修改grub的主配置文件/etc/grub.conf，设置default=0，表示第一个title下的内容为默认启动的kernel（一般新安装的内核在第一个位置），修改之后如下：
- [root@localhost ~]# cat /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 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/sda2
- # initrd /initrd-[generic-]version.img
- #boot=/dev/sda
- default=0
- timeout=5
- splashimage=(hd0,0)/grub/splash.xpm.gz
- hiddenmenu
- title CentOS (3.10.5-3.el6.x86_64)
- root (hd0,0)
- kernel /vmlinuz-3.10.5-3.el6.x86_64 ro root=UUID=78514585-1521-472c-8ca4-110fb82e9959 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
- initrd /initramfs-3.10.5-3.el6.x86_64.img
- title CentOS (2.6.32-431.el6.x86_64)
- root (hd0,0)
- kernel /vmlinuz-2.6.32-431.el6.x86_64 ro root=UUID=78514585-1521-472c-8ca4-110fb82e9959 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
- initrd /initramfs-2.6.32-431.el6.x86_64.img
3、重启系统，这时候你的内核就成功升级了，执行uname -r
内核升级wiki：http://elrepo.org/tiki/tiki-index.php
方法二：
- cd /etc/yum.repos.d
- wget http://www.hop5.in/yum/el6/hop5.repo
- yum install kernel-ml-aufs kernel-ml-aufs-devel -y
本方法没有测试过，有空再试试。
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