安装环境:
rhel6.5_64
MySQL Community Server 5.7.17 64位


下载yum安装源文件：
http://dev.mysql.com/get/mysql57-community-release-el6-9.noarch.rpm


安装下载的mysql57-community-release-el6-9.noarch.rpm


[root@rhel-mysql ~]# rpm -Uvh mysql57-community-release-el6-9.noarch.rpm
Preparing...########################################### [100%]
package mysql57-community-release-el6-9.noarch is already installed


运行yum安装mysql


[root@rhel-mysql ~]# yum install mysql-server


安装完毕后，启动mysql
[root@rhel-mysql ~]# service mysqld start
Initializing MySQL database:[ OK ] --第一次start会出现
Installing validate password plugin:[ OK ] --第一次start会出现
Starting mysqld:[ OK ]


得到初始化root密码
[root@rhel-mysql ~]# grep "password" /var/log/mysqld.log
2016-12-13T15:52:48.468591Z 1 [Note] A temporary password is generated for root@localhost: Tyi>x<a-v3*C
2016-12-13T15:52:53.978420Z 0 [Note] Execution of init_file '/var/lib/mysql/install-validate-password-plugin.8rIs89.sql' started.
2016-12-13T15:52:53.990711Z 0 [Note] Execution of init_file '/var/lib/mysql/install-validate-password-plugin.8rIs89.sql' ended.
2016-12-13T15:52:55.871356Z 0 [Note] Shutting down plugin 'sha256_password'
2016-12-13T15:52:55.871365Z 0 [Note] Shutting down plugin 'mysql_native_password'
2016-12-13T15:52:57.329377Z 3 [Note] Access denied for user 'UNKNOWN_MYSQL_USER'@'localhost' (using password: NO)


在my.cnf中加入validate_password_policy=0
[root@rhel-mysql ~]# vi /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
validate_password_policy=0


重启mysql使my.cnf生效


[root@rhel-mysql ~]# service mysqld restart
Stopping mysqld:[ OK ]
Starting mysqld:[ OK ]


运行 mysql_secure_installation，修改root密码，然后全部默认回车


[root@rhel-mysql ~]# mysql_secure_installation


Securing the MySQL server deployment.


Enter password for user root:
The 'validate_password' plugin is installed on the server.
The subsequent steps will run with the existing configuration
of the plugin.
Using existing password for root.


Estimated strength of the password: 50
Change the password for root ? ((Press y|Y for Yes, any other key for No) :


... skipping.
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? (Press y|Y for Yes, any other key for No) :


... skipping.




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? (Press y|Y for Yes, any other key for No) :
Success.


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? (Press y|Y for Yes, any other key for No) :


... skipping.
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.


Reload privilege tables now? (Press y|Y for Yes, any other key for No) :
Success.


All done!


用新root密码登录数据库
[root@rhel-mysql ~]# mysql -uroot -p11111111
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.7.17 MySQL Community Server (GPL)


Copyright (c) 2000, 2016, 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> show databases;
+--------------------+
| Database|
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys|
+--------------------+
4 rows in set (0.00 sec)


root用户拥有远程登陆的权限


mysql> grant all privileges on *.* to 'root'@'%' identified by '11111111' with grant option;
Query OK, 0 rows affected, 1 warning (0.00 sec)


创建数据库 create datasase zhangsan;


mysql> create database zhangsan;
Query OK, 1 row affected (0.00 sec)


创建用户
mysql> CREATE USER 'hug'@'%' IDENTIFIED BY '12345678';
Query OK, 0 rows affected (0.01 sec)


为新用户是授权
mysql> grant all privileges on zhangsan.* to hug;
Query OK, 0 rows affected (0.00 sec)


至此，mysql 5.7.17 设置完毕
设置mysql自动启动，默认安装完毕后在3、4、5下是默认启动的
[root@rhel-mysql ~]# chkconfig --list mysqld
mysqld 0:off1:off2:off3:on4:on5:on6:off


修改mysqld是否自启动
[root@rhel-mysql ~]# chkconfig --level 345 mysqld off
[root@rhel-mysql ~]# chkconfig --list mysqld
mysqld 0:off1:off2:off3:off4:off5:off6:off
[root@rhel-mysql ~]# chkconfig --level 345 mysqld on
[root@rhel-mysql ~]# chkconfig --list mysqld
mysqld 0:off1:off2:off3:on4:on5:on6:off