Centos7系统使用 yum 安装 MySQL5.7版本流程

wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

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

yum -y install mysql-community-server

[root@centos7 ~]# mysql -V
mysql  Ver 14.14 Distrib 5.7.36, for Linux (x86_64) using  EditLine wrapper

        安装完成后，系统会在 /var/log/mysqld.log 默认创建 root 密码，我们先获取到密码。

        LnI!+M?fG8p6 这个便是 root的密码。

[root@centos7~]#  grep "password" /var/log/mysqld.log
[Note] A temporary password is generated for root@localhost: LnI!+M?fG8p6
[Note] Access denied for user 'root'@'localhost' (using password: NO)
[Note] Access denied for user 'root'@'localhost' (using password: NO)

        使用默认生成的密码登录MySQL后，不能进行，会提示如下的错误：

mysql> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
mysql> 

        所以我们需要修改root的密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';

        修改完密码，退出重新登录后查看可以操作，到此 MySQL 数据库的安装完成

卸载 Yum Repository 

yum -y remove mysql57-community-release-el7-10.noarch