1.查看当前版本

1[root@www.linuxidc.com docker]# cat /etc/issue
2CentOS release 6.8 (Final)
3​
4Kernel \r on an \m

2.升级CentOS

[root@www.linuxidc.com docker]# yum update –y

3.内核升级至3.10

前往http://www.elrepo.org/

3.1下载升级包

[root@localhost ~]# rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org [root@localhost ~]# cd /etc/yum.repos.d/ [root@localhost yum.repos.d]# rpm -ivh http://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm [root@localhost yum.repos.d]# yum --enablerepo=elrepo-kernel install kernel-lt -y

3.2 修改grub.conf文件的default=0

[root@localhost yum.repos.d]# vim /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/VolGroup-lv_root

initrd /initrd-[generic-]version.img

#boot=/dev/sda

default=0

timeout=5

3.3 重启并查看内核

[root@localhost yum.repos.d]# reboot​[root@localhost ~]# uname -r3.10.94-1.el6.elrepo.x86_64[root@localhost ~]# more /etc/issue​CentOS release 6.7 (Final)​Kernel \r on an \m​