Linux系统有网络在线安装MySQL8.0

1.下载rpm软件包

wget http://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm

2.安装MySQL的rpm包

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

3.安装MySQL server

yum install mysql-server

4.启动MySQL服务并查询状态

--启动MySQL服务
systemctl start mysqld

--查看MySQL服务状态
systemctl status mysqld

5.登录mysql

  --查看初始化密码
  grep "password" /var/log/mysqld.log 
  
  --复制粘贴或手动输入上面查到的初始化密码，登录MySQL
  mysql -u root -p 

6.修改初始化密码

alter user 'root'@'localhost' identified by 'Root123!';

修改的密码如果【不满足】MySQL8.0的默认密码策略会出现以下提示：
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
关于密码策略请参考：MySQL8.0修改密码策略