CentOS7.2安装MySQL 5.7.10-12666595
1.下载MySQL源wget http://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm
2.安装MySQL源
sudo rpm -ivh mysql57-community-release-el7-7.noarch.rpm
3.安装mysql-community-server
sudo yum install mysql-community-server -y
4.重启mysql
systemctl restart mysqld
注：自动启动服务用 systemctl enable mysql
5.查看临时密码
grep 'A temporary password' /var/log/mysqld.log
2015-12-24T08:04:50.296020Z 1 A temporary password is generated for root@localhost: I(eKs9PyklP_
6.用临时密码登录mysql并修改root密码，新增用户，打开远程访问
>mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection> Server version: 5.7.10 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>> Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> create user hadoop> Query OK, 0 rows affected (0.00 sec)
mysql>grant all privileges on *.* to 'root'@'%'> Query OK, 0 rows affected, 1 warning (0.00 sec)
7.打开防火墙并重启防火墙，确认端口
sudofirewall-cmd --permanent --add-service mysql
systemctl restart firewalld.service
iptables -L -n|grep 3306
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