centos yum方式安装mysql

1.下载 mysql源安装包

wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

2.安装mysql源

yum localinstall mysql57-community-release-el7-8.noarch.rpm 

3，检查mysql源是否安装成功

yum repolist enabled | grep "mysql.*-community.*"

4.安装Mysql

yum install mysql-community-server

5.启动mysql

systemctl start mysqld

6.设置开机启动

systemctl enable mysqld
systemctl daemon-reload

8.修改root本地登录密码

1）查看mysql初试密码

grep 'temporary password' /var/log/mysqld.log

2）连接mysql

mysql -uroot -p

输入第一步获取的那个密码

3）修改密码

    ALTER USER 'root'@'localhost' IDENTIFIED BY 'Newpassword';
    或者
    set password for 'root'@'localhost'=password('Newpassword');

可能会出现下面的错误

Your password does not satisfy the current policy requirements