centos7.5安装mysql8.0

1.下载安装包 

wget https://repo.mysql.com//mysql80-community-release-el7-3.noarch.rpm

2.安转软件源

rpm -Uvh mysql80-community-release-el7-3.noarch.rpm

3.安装mysql服务端

yum install -y mysql-community-server

4.启动mysql

service mysqld start

5.修改mysql临时密码

5.1查看临时密码

cat /var/log/mysqld.log

5.2复制密码使用root登录mysql(直接黏贴就好)

mysql -uroot -p

5.3设置2个全局参数(不设置密码会修改不成功 貌似是限制密码的规则的)

mysql7执行以下名称：

set global validate_password_policy=0;
set global val