# 安装
[root@localhost ~]# yum install mysql mysql-server -y

报错

[root@ossec-server ~]# yum install mysql-server
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
No package mysql-server available.
Error: Nothing to do

原因

yum安装库里没有直接可以用的安装包，这时候就需要用到MariaDB了，MariaDB是MySQL社区开发的分支，也是一个增强型的替代品。

解决

https://www.cnblogs.com/zlslch/p/9098155.html

https://blog.51cto.com/13043516/2056974

# 从社区获得repo
rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm

# 启动
[root@localhost ~]# systemctl start mysqld
[root@localhost ~]# systemctl enable mysqld

# 初始化
[root@localhost ~]# mysql_secure_installation