1. 下载mysql的源 wget http://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm

2. 安装yum库 yum localinstall -y mysql57-community-release-el7-7.noarch.rpm

3. 安装MySQL yum install -y mysql-community-server

4. 启动MySQL服务 systemctl start mysqld.service

5. MySQL5.7加强了root用户的安全性，因此在第一次安装后会初始化一个随机密码，以下为查看初始随机密码的方式 grep 'temporary password' /var/log/mysqld.log

登录mysql   mysql -u root -pSET PASSWORD = PASSWORD('你的密码');
ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
flush privileges;
然后退出后即可用新密码登录。
远程连接授权：
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '你的密码' WITH GRANT OPTION;systemctl start mysqld.service
systemctl stop mysqld.service
systemctl restart mysqld.service
systemctl enable mysqld.servicesystemctl start mariadb.service支持表情数据库
[client]
default-character-set = utf8mb4
[mysql]
default-character-set = utf8mb4
[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
init_connect='SET NAMES utf8mb4'