1.下載MySQL官方的 Yum Repository
wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

2.yum 安裝MySQL官方的 Yum Repository
yum -y install mysql57-community-release-el7-10.noarch.rpm

3.安裝MySQL伺服器
yum -y install mysql-community-server

4.啟動mysql
systemctl start mysqld.service

5.檢視 mysql 是否安裝成功

ps -ef | grep mysql
mysqladmin --version

6.啟動mysql，設定開機自啟，檢視mysql狀態

systemctl start mysqld
systemctl enable mysqld
systemctl status mysqld

7.在日誌檔案中找到root密碼
grep "password" /var/log/mysqld.log

8.登入mysql
mysql -uroot -p

9.修改MySQL預設密碼, 密碼設定必須要大小寫字母數字和特殊符號（,/';:等）
alter user 'root'@'localhost' identified by 'Root123,';

10.開啟遠端訪問限制
grant all privileges on *.* to 'root'@'%' identified by 'Root123,' with grant option;
flush privileges;
exit
11.開啟安全組許可權，遠端連線測試