centos 快速安装kernel-ml最新版内核
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm -y
yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
yum --enablerepo=elrepo-kernel install kernel-ml -y
grubby --info=ALL
grubby --set-default-index=0
grubby --default-kernel
init 6