先设置源
vi /etc/yum.repos.d/MariaDB.repo
[mariadb]
name = MariaDB
baseurl = https://mirrors.ustc.edu.cn/mariadb/yum/10.1/centos7-amd64/
gpgkey=https://mirrors.ustc.edu.cn/mariadb/yum/RPM-GPG-KEY-MariaDB
gpgcheck=1
rpm --import https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
安装好后直接mysql -u root 登录即可空密码