yum安装mysql，在学习测试sql语句时方便省事，记录下来吧 安装就几条命令： wget http://repo.mysql.com/mysql57-community-release-el7-8.noarch.rpm rpm -ivh mysql57-community-release-el7-8.noarch.rpm yum install mysql-server mysql -y 登录： grep 'password' /var/log/mysqld.log |head -n1 初始随机密码（mysql5.7及以后版本） 修改密码 ALTER USER 'root'@'localhost' IDENTIFIED BY 'Bdqn20121120..'; （大写 小写 特殊字符） 如果是免密码登录，则执行下面命令： update mysql.user set authentication_string=password('Bdqn20121120..') where user='root' and Host ='localhost'; ERROR 1819 (HY000): Your password does not satisfy the current policy requirements 密码不满足要求 flush privileges; 刷新权限