centos7.4系统中yum源安装mysql 5.6

系统环境：centos7.4

一,查看是否安装有数据库：

yum list installed | grep mysqld/mariadb

二，安装centos7系统带有mysql5.6安装包的yum源RPM资源包：

rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm

yum clean all

yum repolist

三，安装msyql5.6：

yum -y install mysql-community-server

四，启动服务：

systemctl start mysqld

systemctl enable mysqld

五，重置密码：是具体情况而定(可以省略，无密码登陆)

#mysql_secure_installation

Set root password? [Y/n] y              [设置root用户密码]

Remove anonymous users? [Y/n] y           [删除匿名用户]

Disallow root login remotely? [Y/n] n        [禁止root远程登录]

Remove test database and access to it? [Y/n] y    [删除test数据库]

Reload privilege tables now? [Y/n] y         [刷新权限]

六，查看mysql版本：

mysql -V

mysql Ver 14.14 Distrib 5.6.39, for Linux (x86_64) using EditLine wrapper

七，验证：(无密码)

mysql -uroot -p 密码

八、设置密码和远程权限

数据库密码设置：#set password for <a href="mailto:'root'@'localhost'=password('userpasswd'" rel="external nofollow">'root'@'localhost'=password('userpasswd'</a>);

九、配置防火墙

  firewall-cmd --zone=public --add-port=3306/tcp --permanent