Linux安装MySQL8

1、在用户目录

    cd ~

2、下载MySQL安装包

    wget https://repo.mysql.com//mysql80-community-release-el7-1.noarch.rpm

3、安装rpm包

    rpm -ivh mysql80-community-release-el7-1.noarch.rpm

4、修改MySQL的repo源，保证MySQL正常启用（最新版的不需要修改）

    cd /etc/yum.repos.d/

    vim mysql-community.repo

    改成下图这样

5、安装MySQL server

    yum -y install mysql-server

6、修改 MySQL 的访问权限

    chown -R root:root /var/lib/mysql

7、启动MySQL

    systemctl start mysqld

8、查看MySQL给的默认密码

     cat /var/log/mysqld.log | grep password

9、登录进去修改密码

    若想修改成简单的密码

    执行：set global validate_password.policy=0;

    执行：set global validate_password.length=1;

    执行：ALTER USER 'root'@'localhost' IDENTIFIED BY '123456' PASSWORD EXPIRE NEVER;  

     设置新密码及其加密规则：

        ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';

    此时，密码设置完成，密码为123456

 10、开启远程连接

        执行：mysql -uroot –p123456进入MySQL

        执行：show databases;

        执行：use mysql;

        执行：select Host,User from user \G;

        执行：update user set Host = '%' where Host = 'localhost' and User = 'root';

        执行：select Host,User from user \G;  查看是否更改

         执行：flush privileges; 或者重启mysql服务器

        此时，Navicat就可以远程访问数据库了