Centos7安装mysql

# 安装系统扩展（装一次就可以啦）
[root@localhost ~]# yum install epel-release.noarch
# 开始检索安装
[root@localhost ~]# yum list
[root@localhost ~]# yum list |grep mariadb
[root@localhost ~]# yum install mariadb*
[root@localhost ~]# stytemctl start mariadb
[root@localhost ~]# systemctl enable mariadb
[root@localhost ~]# mysql_secure_installation
[root@localhost ~]# systemctl restart mariiadb
[root@localhost ~]# mysql -uroot -p123456