更换 centos6 的内核为 oracle uek 内核
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2016/11/16
一、使用 oracle 提供的脚本完整替换 参考：http://www.tuicool.com/articles/IRbU3e [root@svr205-7 ~]# curl -O https://linux.oracle.com/switch/centos2ol.sh [root@svr205-7 ~]# sh centos2ol.sh [root@svr205-7 ~]# yum upgrade oh yeah，升级完毕，注意upgrade的时候，磁盘空间要足够。 [root@svr205-7 ~]# rpm -qif /etc/redhat-release Name : oraclelinux-release Relocations: (not relocatable) Version : 6Server Vendor: Oracle America Release : 6.0.2 Build Date: Thu 16 Oct 2014 10:08:37 AM CST Install Date: Thu 28 May 2015 01:50:37 PM CST Build Host: ca-buildj3.us.oracle.com Group : System Environment/Base Source RPM: oraclelinux-release-6Server-6.0.2.src.rpm Size : 49559 License: GPL Signature : RSA/8, Thu 16 Oct 2014 10:41:14 AM CST, Key ID 72f97b74ec551f03 Summary : Oracle Linux 6 release file Description : System release and information files [root@svr205-7 ~]# cat /etc/issue Oracle Linux Server release 6.6 Kernel \r on an \m [root@svr205-7 ~]# uname -r 2.6.32-504.23.4.el6.x86_64 [root@svr205-7 ~]# 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/mapper/vg_svr2057-lv_root # initrd /initrd-[generic-]version.img #boot=/dev/sda default=0 timeout=5 splashp_w_picpath=(hd0,0)/grub/splash.xpm.gz hiddenmenu title Oracle Linux Server Red Hat Compatible Kernel (2.6.32-504.23.4.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-504.23.4.el6.x86_64 ro root=/dev/mapper/vg_svr2057-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=vg_svr2057/lv_swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_svr2057/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-504.23.4.el6.x86_64.img title Oracle Linux Server Red Hat Compatible Kernel (2.6.32-431.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-431.el6.x86_64 ro root=/dev/mapper/vg_svr2057-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=vg_svr2057/lv_swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_svr2057/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-431.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=/dev/mapper/vg_svr2057-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=vg_svr2057/lv_swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_svr2057/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-431.el6.x86_64.img 问题：如果脚本执行失败（如遇到yum源相关的异常），可能比较麻烦，因为脚本中卸载掉了旧的内核版本的一些依赖包，请引起重视。 二、仅更换一个内核 1）准备安装 oracle uek 内核 [root@test ~]# wget http://public-yum.oracle.com/public-yum-ol6.repo -O /etc/yum.repos.d/public-yum-ol6.repo [root@test ~]# rpm --import http://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol6 [root@test ~]# yum install yum-plugin-downloadonly -y [root@test ~]# yum install --downloadonly --downloaddir=/tmp/ kernel-uek -y 2）安装 uek [root@test ~]# cd /tmp [root@test tmp]# yum localinstall kernel-uek* 使用新的内核，编辑 grub 调整启动顺序： [root@test tmp]# vim /etc/grub.conf 重启系统后查看： [root@test tmp]# uname -r 2.6.39-400.290.1.el6uek.x86_64
