先进行系统更新

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yum update -y

编辑yum配置文件，使用阿里云镜像

• 这里以 MariaDB 10.5为例

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  vim /etc/yum.repos.d/MariaDB10.repo #http://downloads.mariadb.org/mariadb/repositories/ [mariadb] name = MariaDB baseurl = https://mirrors.aliyun.com/mariadb/yum/10.5/centos7-amd64 gpgkey = https://mirrors.aliyun.com/mariadb/yum/RPM-GPG-KEY-MariaDB gpgcheck = 1