阿里云CentOS7.8安装MySQL5.7

1. 获取MySQL5.7yum源

wget  http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

2. 安装MySQL

yum install -y mysql57-community-release-el7-10.noarch.rpm
yum install -y mysql-community-server

3. 启动MySQL

systemctl start mysqld

4. 查看MySQL初始密码

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

5. 登录MySQL，执行下面的命令后输入第4步查出来的密码

mysql -u root -p

6. 修改root密码

set global validate_password_policy=0;
set password for root@localhost = password('new password');
flush privileges;

7. 开放本地连接MySQL

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
FLUSH PRIVILEGES;

【参考链接】
https://www.cnblogs.com/wangbg/p/15930531.html
https://blog.csdn.net/weixin_47593552/article/details/111604643/