1：添加 MariaDB yum 仓库
vi /etc/yum.repos.d/MariaDB.repo
在该文件中添加以下内容保存：
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.2/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=
2：安装 MariaDB
yum install MariaDB-server MariaDB-client -y
（1）安装完毕后，立即启动数据库服务守护进程。
systemctl start mariadb
（2）设置 MariaDB 在操作系统重启后自动启动服务
systemctl enable mariadb
（3）查看 MariaDB 服务当前状态
systemctl status mariadb
3：对 MariaDB 进行安全配置
设置 MariaDB 的 root 账户密码，删除匿名用户，禁用 root 远程登录，删除测试数据库，重新加载权限表。
mysql_secure_installationSet root password? [Y/n] Y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.Remove anonymous users? [Y/n] Y
... Success!Normally, root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.Disallow root login remotely? [Y/n] Y
... Success!By default, MariaDB comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.Remove test database and access to it? [Y/n] Y
- Dropping test database...
... Success!
- Removing privileges on test database...
... Success!Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.Reload privilege tables now? [Y/n] Y
... Success!Cleaning up...All done! If you've completed all of the above steps, your MariaDB
installation should now be secure.Thanks for using MariaDB!
4：基本配置
（1）设置数据库字母大小写不敏感
vi /etc/my.cnf.d/server.cnf在[mysqld]下加上】
lower_case_table_names=
（2）设置MariaDB数据库默认编码
vi /etc/my.cnf.d/client.cnf
在[client]字段里加入
default-character-set=utf8vi /etc/my.cnf.d/server.cnf
在[mysqld]字段里加入
character-set-server=utf8
（3）修改默认端口号3306修改为3366
vi /etc/my.cnf.d/client.cnf
在[client]字段修改
port=vi /etc/my.cnf.d/server.cnf
在[mysqld]字段里加入
port=
（4）修改最大连接数
vi /etc/my.cnf.d/server.cnf
[mysqld] 下面增加下面配置：
max_connections=查看最大连接数
show variables like '%max_connections%';
（5）修改max_allowed_packet
vi /etc/my.cnf.d/server.cnf
[mysqld] 下面增加下面配置：
max_allowed_packet=16M
5：最后重启 MariaDB 配置生效
systemctl restart mariadb
