由於本人想在CentOS 6.9上安裝Docker容器，發現內核版本過低，2.6.32-696，操作系統是6.9 x86_64位，因此便升級內核到3.8及以上長期穩定支持版本。
[root@test01 ~]# uname -r #內核查看確認 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 #安裝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 #安裝內核操作，操作記錄如下： 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 #查看內核是否升級及重啟生效。 4.4.101-1.el6.elrepo.x86_64