centos7安装MySQL及远程配置

#下载mysql源安装包
shell> wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

#安装mysql源shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm

检查mysql源是否安装成功
shell> yum repolist enabled | grep “mysql.-community.”

看到上图所示表示安装成功。

2、安装MySQL
shell> yum install mysql-community-server

3、启动MySQL服务
shell> service mysqld start

4、查看MySQL的启动状态
shell> systemctl status mysqld
显示active

5、开机启动
shell> systemctl enable mysqldshell> systemctl daemon-reload

6、修改root本地登录密码
mysql安装完成之后，在/var/log/mysqld.log文件中给root生成了一个默认密码。通过下面的方式找到root默认密码，然后登录mysql进行修改：
shell> grep ‘temporary password’ /var/log/mysqld.log

如果没有结果，删除原来安装过的mysql残留的数据（这一步非常重要，问题就出在这）

rm -rf /var/lib/mysql

重启mysqld服务
systemctl restart mysqld

7、登录后修改root密码
use mysql;
ALTER USER ‘root’@‘localhost’ IDENTIFIED BY ‘root’;
执行flush privileges;

8、设置远程连接，允许root用户以root密码在各节点上登录

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'admin123' WITH GRANT OPTION;
flush privileges;
Service mysqld restart   //重启mysql