mysql新增专给特定IP访问的用户

1 新创建同时授权用户：

[root@XX-90 ~]# mysql -root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5386
Server version: 5.5.15-log MySQL Community Server (GPL)

Copyright (c) 2000, 2010, 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> 
mysql> grant select,insert,update,delete on my_test_db.* to biao@localhost Identified by "123456";

上面的my_test_db是要授权访问到的数据库实例，biao是新用户名，123456是密码，localhost应该是数据库允许被访问的ip

2 创建用户后，可以在mysql数据库的user表看到新创建的用户信息：

mysql> show database;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    15
Current database: karaoke

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'database' at line 1
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
6 rows in set (0.00 sec)

mysql> use mysql
Database changed
mysql> show tables;
+---------------------------+
| Tables_in_mysql           |
+---------------------------+
| columns_priv              |
| db                        |
| event                     |
| func                      |
| general_log               |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| host                      |
| ndb_binlog_index          |
| plugin                    |
| proc                      |
| procs_priv                |
| proxies_priv              |
| servers                   |
| slow_log                  |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+
24 rows in set (0.00 sec)

mysql> select * from user where user='karaoke' \G
*************************** 1. row ***************************
                 Host: localhost
                 User: biao
             Password: *E7E5651E6FD1A0960EC95E6DE3D971537515F66E
          Select_priv: Y
          Insert_priv: Y
          Update_priv: Y
          Delete_priv: Y
          Create_priv: N
            Drop_priv: N
          Reload_priv: N
        Shutdown_priv: N
         Process_priv: N
            File_priv: N
           Grant_priv: N
      References_priv: N
           Index_priv: N
           Alter_priv: N
         Show_db_priv: N
           Super_priv: N
Create_tmp_table_priv: N
     Lock_tables_priv: N
         Execute_priv: N
      Repl_slave_priv: N
     Repl_client_priv: N
     Create_view_priv: N
       Show_view_priv: N
  Create_routine_priv: N
   Alter_routine_priv: N
     Create_user_priv: N
             ssl_type: 
           ssl_cipher: 
          x509_issuer: 
         x509_subject: 
        max_questions: 0
          max_updates: 0
      max_connections: 0
 max_user_connections: 0
1 row in set (0.00 sec)

如果你的结果不面上面user='biao'那样，你可以自己update这个表这段信息，如我想让这个用户只给10.11.11.11的IP访问，就update user set Host='10.11.11.11' where User='biao';

3 新增用户授权后无法使用，如ip为10.11.11.11无法使用，这里不用急，我是通过重启数据库来让它生效的：

#创建用户后,外面机如如还没法登陆,可以重启数据库服务:
[root@TJHY95-90 ~]# sodu service mysql restart;
-bash: sodu: command not found
[root@TJHY95-90 ~]# sudo service mysql restart;  
Shutting down MySQL.....                                   [确定]
Starting MySQL....                                         [确定]
[root@TJHY95-90 ~]# mysql -uroot -p

这样外面就可以访问了，如这里我指定了10.11.11.11这台机来访问，那么在这台机上使用如下访问语句:

[root@xx11-11 ~]# hostname -i
10.11.11.11
[root@xx11-11 ~]# mysql -ukaraoke -pkaraoke  -h10.11.11.142
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 17
Server version: 5.5.15-log MySQL Community Server (GPL)

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql>

这里的10.11.11.142是我们刚才数据库所在的IP。

更多参考：

如果在源代码编译未安装成功的情况，用yum安装是比较好的选择，特别是对新手来说，是很好的选择，安装的过程很简单，只要输入：yum -y install mysql-server ，系统自动下载和安装Mysql的，
chkconfig --add mysqld 在服务清单中添加mysql服务
service mysqld start 服务启动
mysqladmin -u root password 'newpassword' 更改密码
mysql -u root -p
mysql> DROP DATABASE test; 删除test数据库
mysql> DELETE FROM mysql.user WHERE user = ''; 删除匿名帐户
mysql> FLUSH PRIVILEGES; 重载权限

添加mysql用户：GRANT ALL PRIVILEGES ON my_db.* TO 'user'@'localhost' IDENTIFIED BY 'password';

mysql新增专给特定IP访问的用户

mysql设置允许外部访问

yum安装Mysql

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