查看当前系统情况 uname -r cat /etc/issue 更新安装 yum update -y rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org cd /etc/yum.repos.d/ rpm -Uvh https://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm yum --enablerepo=elrepo-kernel install kernel-lt -y 备份 cp /etc/grub.conf /etc/grub.conf.backup 修改，default=0 vim /etc/grub.conf 重启 reboot 开机后再查看 uname -r more /etc/issue 参考 https://www.cnblogs.com/ywqbj/p/5756746.html