centos 7.6 安装mysql

1.使用wget指令下载YUM Repositry并安装以找到合适的YUM Server 

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

2.用yum指令下载并安装mysql

yum -y install mysql-community-server

3.启动服务

systemctl start  mysqld.service

4.查看root的临时密码

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

5.用root的临时密码登陆mysql

mysql -u root -p 

6.修改root密码         

//修改密码策略
set global validate_password_policy = 0 //0-低强度，1-中强度，2-高强度
set global validate_password_length=4 //修改最小密码长度

set password for 'root'@'localhost'=password('root') //更新密码

7.开启远程登陆

use mysql
update user set host="%" where user="root"
flush privileges


//另一台主机通过mysql连接远程数据库
mysql -h 1.1.1. -p3306 -u root -p