CentOS安装MySQL

　　官方指南：https://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/

　　查看yum源

　　下载安装包，tips：tab键自动补全文件名

wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm

sudo rpm -Uvh mysql80-community-release-el7-3.noarch.rpm

　　安装mysql-server

sudo yum install -y mysql-community-server

　　启动mysql

sudo systemctl start mysqld
sudo systemctl enable mysqld

　　查看默认密码

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

　　登录mysql

mysql -u root -p

　　登录之后第一件事就是更改密码

　　修改默认密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'pswd4root@L';

　　查看用户表

show database;
use mysql;
select host,user from user;

　　修改允许访问的来源

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'pwd4root' WITH GRANT OPTION;
FLUSH PRIVILEGES;

　　也可以通过修改user表的host来设置允许访问的来源，host='%'是允许任何来源，也可以修改为指定ip。

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

　　退出mysql

quit

　　开放防火墙端口

firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --reload

　　远程连接mysql