[root@iZ28gvqe4biZ ~]# rpm -Uvh http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm

获取http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm

准备中...                          ################################# [100%]

正在升级/安装...

   1:mysql-community-release-el7-5    ################################# [100%]

[root@iZ28gvqe4biZ ~]# yum repolist enabled | grep "mysql.*-community.*"

mysql-connectors-community/x86_64 MySQL Connectors Community                  17

mysql-tools-community/x86_64      MySQL Tools Community                       31

mysql56-community/x86_64          MySQL 5.6 Community Server                 199

安装MySQL

[root@iZ28gvqe4biZ ~]# yum -y install mysql-community-server

加入开机启动

[root@iZ28gvqe4biZ ~]# systemctl enable mysqld

启动mysql服务进程

[root@iZ28gvqe4biZ ~]# systemctl start mysqld

[root@iZ28gvqe4biZ ~]# mysql_secure_installation

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL

      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MySQL to secure it, we'll need the current

password for the root user.  If you've just installed MySQL, and

you haven't set the root password yet, the password will be blank,

so you should just press enter here.

Enter current password for root (enter for none):

OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MySQL

root user without the proper authorisation.

Set root password? [Y/n] y        [设置root用户密码]

New password:

Re-enter new password:

Password updated successfully!

Reloading privilege tables..

 ... Success!

By default, a MySQL installation has an anonymous user, allowing anyone

to log into MySQL without having to have a user account created for

them.  This is intended only for testing, and to make the installation

go a bit smoother.  You should remove them before moving into a

production environment.

Remove anonymous users? [Y/n] y            [删除匿名用户]

 ... Success!

Normally, root should only be allowed to connect from 'localhost'.  This

ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] n            [禁止root远程登录]

 ... skipping.

By default, MySQL comes with a database named 'test' that anyone can

access.  This is also intended only for testing, and should be removed

before moving into a production environment.

Remove test database and access to it? [Y/n] y       [删除test数据库]

 - Dropping test database...

ERROR 1008 (HY000) at line 1: Can't drop database 'test'; database doesn't exist

 ... Failed!  Not critical, keep moving...

 - Removing privileges on test database...

 ... Success!

Reloading the privilege tables will ensure that all changes made so far

will take effect immediately.

Reload privilege tables now? [Y/n] y        [刷新权限]

 ... Success!

All done!  If you've completed all of the above steps, your MySQL

installation should now be secure.

Thanks for using MySQL!

Cleaning up...

//登录MYSQL（有ROOT权限）。这里我以ROOT身份登录

[root@iZ28gvqe4biZ ~]# mysql -u root -p

//首先为用户创建一个数据库hivemeta

mysql  > create database hivemeta;

mysql  > use hivemeta

//授权hdp用户拥有hivemeta数据库的所有权限。

mysql  > grant all privileges on *.* to hdp@"%" identified by "hdp" with grant option;

//刷新系统权限表

mysql  > flush privileges;

mysql  > use hivemeta;

//mysql/hive字符集问题

mysql  > alter database hivemeta character set latin1;

//使用root登录mysql

mysql -u root -p

//切换数据库

mysql>use mysql

//修改数据

mysql>update user set host = '%' where user = 'root';

//查询数据

mysql>select host, user from user;

//允许远程使用root账号登录

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

//刷新权限

mysql>flush privileges;