Centos7 开启安全更新

vim  update.sh

#!/bin/sh
#更新epel源
#yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum install epel-release -y;
#安装yum-cron
yum install yum-cron -y
#修改yum-cron
sed -i 's/update_cmd = default/update_cmd = security/' /etc/yum/yum-cron.conf
sed -i 's/apply_updates = no/apply_updates =yes/' /etc/yum/yum-cron.conf
systemctl start yum-cron;
systemctl enable yum-cron