CentOS 7下安裝MySQL

首先下載rpm，比如mysql57-community-release-el7-9.noarch.rpm

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

然後

sudo rpm -ivh mysql57-community-release-el7-9.noarch.rpm 
sudo yum install mysql-server

之後我們要查看安裝MySQL時隨機生成的臨時密碼，同時

grep "password" /var/log/mysqld.log
sudo chown -R root:root /var/lib/mysql

然後我們就可以用查到的臨時密碼登錄了。

mysql -u root -p

修改密碼

set global validate_password_policy=0; 
ALTER USER USER() IDENTIFIED BY 'YourPassword';