Centos7安装mysql8

1. wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-community-server-8.0.18-1.el8.x86_64.rpm

2.yum localinstall mysql-community-server-8.0.18-1.el8.x86_64.rpm

3.yum install -y mysql-commiunity-server

4.启动mysql服务：systemctl start mysqld

   检查mysql状态：systemctl status msyqld

5.查找mysql root用户的初始密码：grep "password" /var/log/mysqld.log

6.进入数据库:mysql -uroot -p, 输入初始密码；

7.修改root密码：ALTER USER 'root'@'localhost' IDENTIFIED BY 'P@ssw0rd';

8.配置root远程登陆：

   use mysql;  #使用mysql

   UPDATE user SET Host='%' WHERE User='root';  #设置账号

 　flush privileges;

9.windows使用navicat for mysql连接数据库，报错：1251...；这种错误的原因是mysql8之前版本的加密规则是mysql_native_password,而在mysql8之后，加密规则是caching_sha2_password;

解决方法：将mysql用户登录密码加密规则还原成mysql_native_password;

 

 ALTER USER 'root'@'%' IDENTIFIED BY 'P@ssw0rd' PASSWORD EXPIRE NEVER;

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'P@ssw0rd';

FLUSH PRIVILEGES; #刷新权限；

这样Windows的navicat 就可以连接mysql了