运行脚本,并根据列表选择启动内核

#!/bin/bash
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 -y install kernel-lt  --disablerepo="*" --enablerepo="elrepo-kernel"
echo "可选启动内核:"
cat /boot/grub2/grub.cfg | grep -v rescue | grep ^menuentry
echo "请选择启动内核"
echo "例如:grub2-set-default 'CentOS Linux (3.10.0-693.el7.centos.toa.x86_64) 7 (Core)'"