由于本人想在CentOS 6.9上安装Docker容器，发现内核版本过低，2.6.32-696，操作系统是6.9 x86_64位，因此便升级内核到3.8及以上长期稳定支持版本。
[root@test01 ~]# uname -r #内核查看确认 2.6.32-696.16.1.el6.x86_64 [root@test01 ~]# [root@test01 ~]# rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org [root@test01 ~]# rpm -Uvh http://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm #安装yum源 Retrieving http://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm Preparing... ########################################### [100%] 1:elrepo-release ########################################### [100%] [root@test01 ~]# yum --enablerepo=elrepo-kernel install kernel-lt -y #安装内核操作，操作记录如下： Loaded plugins: fastestmirror Repository base is listed more than once in the configuration Repository updates is listed more than once in the configuration Repository extras is listed more than once in the configuration Repository centosplus is listed more than once in the configuration Repository contrib is listed more than once in the configuration Setting up Install Process Loading mirror speeds from cached hostfile * base: mirrors.cn99.com * elrepo: mirrors.tuna.tsinghua.edu.cn * elrepo-kernel: mirrors.tuna.tsinghua.edu.cn * epel: mirrors.tongji.edu.cn * extras: mirrors.cn99.com * updates: mirrors.cn99.com elrepo | 2.9 kB 00:00 elrepo/primary_db | 675 kB 00:00 elrepo-kernel | 2.9 kB 00:00 elrepo-kernel/primary_db | 18 kB 00:00 Resolving Dependencies --> Running transaction check ---> Package kernel-lt.x86_64 0:4.4.101-1.el6.elrepo will be installed --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================= Package Arch Version Repository Size ============================================================================================================================================================= Installing: kernel-lt x86_64 4.4.101-1.el6.elrepo elrepo-kernel 38 M Transaction Summary ============================================================================================================================================================= Install 1 Package(s) Total download size: 38 M Installed size: 174 M Downloading Packages: kernel-lt-4.4.101-1.el6.elrepo.x86_64.rpm | 38 MB 00:29 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Warning: RPMDB altered outside of yum. Installing : kernel-lt-4.4.101-1.el6.elrepo.x86_64 1/1 Verifying : kernel-lt-4.4.101-1.el6.elrepo.x86_64 1/1 Installed: kernel-lt.x86_64 0:4.4.101-1.el6.elrepo Complete! [root@test01 ~]# [root@test01 ~]# vim /etc/grub.conf
[root@test01 ~]# reboot [root@test01 ~]# uname -r #查看内核是否升级及重启生效。 4.4.101-1.el6.elrepo.x86_64