CentOS7系统升级

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vim /etc/yum.repos.d/CentOS-local.repo
[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.aliyun.com/centos/7.6.18.10/os/$basearch/
gpgcheck=0
enabled=1

[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.aliyun.com/centos/7.6.18.10/updates/$basearch/
gpgcheck=0
enabled=1

yum clean all
yum repolist
yum -y update
reboot