centos 7.2 开启和关闭自动更新

[root@localhost ~]# vi /etc/yum
 
[root@localhost yum]# yum install yum-cron -y
 
[root@localhost yum]# ls
fssnap.d  pluginconf.d  protected.d  vars  version-groups.conf  yum-cron.conf  yum-cron-hourly.conf
[root@localhost yum]# vi yum-cron.conf
 
 
开启自动更新
[root@localhost ~]# systemctl start crond
 
[root@localhost ~]# yum -y install cronie
[root@localhost ~]# yum -y install yum-cron
[root@localhost ~]# systemctl start yum-cron
 
关闭自动更新
[root@localhost ~]# gedit /etc/yum/yum-cron.conf
update_messages = no
download_updates = no