1. Install mariadb
yum install mysql-server
Two, start mariadb
systemctl start mariadb，可能会报错，且报错信息显示如下：
Troubleshooting
● Check mariadb service status
systemctl status mariadb.service，可以看到mariadb服务运行异常
● View mariadb log
tail /var/log/mariadb/mariadb.log,可以看到报错信息：Could not open......loaded
● According to the error information Baidu query solution
1. 停止mariadb服务：systemctl stop mariadb，
2. 删除所有mysql lib文件：rm -r /var/lib/mysql/*
3. 执行该命令：mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
4. 启动mariadb服务：systemctl start mariadb
5. 检查mariadb服务是否正常启动：systemctl status mariadb.service
3. Set the boot to start automatically
systemctl enable mariadb
Fourth, initialize mariadb
mysql_secure_installation
# 注：运行结果用 ··· 代替
Enter current password for root (enter for none): # 输入root(mysql)的密码，初次安装默认没有，直接回车
...
Switch to unix_socket authentication [Y/n] n # 是否切换到unix套接字身份验证[Y/n]
...
Change the root password? [Y/n] y #是否设置root用户密码
New password: # 新密码
Re-enter new password: # 再次输入密码
...
Remove anonymous users? [Y/n] y # 是否删除匿名用户，建议删除
...
Disallow root login remotely? [Y/n] n # 是否禁止root远程登录，建议开启
...
Remove test database and access to it? [Y/n] n # 是否删除test数据库，可以保留
...
Reload privilege tables now? [Y/n] y # 是否重新加载权限表，也可以直接回车
...
Thanks for using MariaDB! # 看到这句话证明设置成功
5. Test whether mariadb can log in normally
输入：mysql -u root -p，测试可以正常登陆
Six, set the character set
进入配置文件：vi /etc/my.cnf.d/client.cnf ，添加：default-character-set=utf8
Seven, check the character set
8. Turn off the firewall
永久关闭防火墙：systemctl disable firewalld.service
Nine, open remote login
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'IDENTIFIED BY '123456' WITH GRANT OPTION;
10. Test
