更换 centos6 的内核为 oracle uek 内核

更换 centos6 的内核为 oracle uek 内核

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 upgradeoh 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 AmericaRelease     : 6.0.2                         Build Date: Thu 16 Oct 2014 10:08:37 AM CSTInstall Date: Thu 28 May 2015 01:50:37 PM CST      Build Host: ca-buildj3.us.oracle.comGroup       : System Environment/Base       Source RPM: oraclelinux-release-6Server-6.0.2.src.rpmSize        : 49559                            License: GPLSignature   : RSA/8, Thu 16 Oct 2014 10:41:14 AM CST, Key ID 72f97b74ec551f03Summary     : Oracle Linux 6 release fileDescription :System release and information files[root@svr205-7 ~]# cat /etc/issueOracle Linux Server release 6.6Kernel \r on an \m[root@svr205-7 ~]# uname -r2.6.32-504.23.4.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/sdadefault=0timeout=5splashp_w_picpath=(hd0,0)/grub/splash.xpm.gzhiddenmenutitle 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.imgtitle 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.imgtitle 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 -y2）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 -r2.6.39-400.290.1.el6uek.x86_64