MySQL创建用户与授权

作者:freethy 发布于:2012-6-30 13:31 Saturday

注:我的运行环境是widnows xp professional + MySQL5.0

一, 创建用户:

       命令:CREATE USER 'username'@'host' IDENTIFIED BY 'password';

       说明:username - 你将创建的用户名, host - 指定该用户在哪个主机上可以登陆,如果是本地用户可用localhost, 如果想让该用户可以从任意远程主机登陆,可以使用通配符%. password - 该用户的登陆密码,密码可以为空,如果为空则该用户可以不需要密码登陆服务器.

      例子: CREATE USER 'dog'@'localhost' IDENTIFIED BY '123456';
               CREATE USER 'pig'@'192.168.1.101_' IDENDIFIED BY '123456';
               CREATE USER 'pig'@'%' IDENTIFIED BY '123456';
               CREATE USER 'pig'@'%' IDENTIFIED BY '';
               CREATE USER 'pig'@'%';

二,授权:

      命令:GRANT privileges ON databasename.tablename TO 'username'@'host'

     说明: privileges - 用户的操作权限,如SELECT , INSERT , UPDATE 等(详细列表见该文最后面).如果要授予所的权限则使用ALL.;databasename - 数据库名,tablename-表名,如果要授予该用户对所有数据库和表的相应操作权限则可用*表示, 如*.*.

      例子: GRANT SELECT, INSERT ON test.user TO 'pig'@'%';
               GRANT ALL ON *.* TO 'pig'@'%';

      注意:用以上命令授权的用户不能给其它用户授权,如果想让该用户可以授权,用以下命令:
           GRANT privileges ON databasename.tablename TO 'username'@'host' WITH GRANT OPTION;

三.设置与更改用户密码

     命令:SET PASSWORD FOR 'username'@'host' = PASSWORD('newpassword');如果是当前登陆用户用SET PASSWORD = PASSWORD("newpassword");

      例子: SET PASSWORD FOR 'pig'@'%' = PASSWORD("123456");

四.撤销用户权限

      命令: REVOKE privilege ON databasename.tablename FROM 'username'@'host';

     说明: privilege, databasename, tablename - 同授权部分.

      例子: REVOKE SELECT ON *.* FROM 'pig'@'%';

      注意: 假如你在给用户'pig'@'%'授权的时候是这样的(或类似的):GRANT SELECT ON test.user TO 'pig'@'%', 则在使用REVOKE SELECT ON *.* FROM 'pig'@'%';命令并不能撤销该用户对test数据库中user表的SELECT 操作.相反,如果授权使用的是GRANT SELECT ON *.* TO 'pig'@'%';则REVOKE SELECT ON test.user FROM 'pig'@'%';命令也不能撤销该用户对test数据库中user表的Select 权限.

      具体信息可以用命令SHOW GRANTS FOR 'pig'@'%'; 查看.

五.删除用户

      命令: DROP USER 'username'@'host';

附表:在MySQL中的操作权限

ALTER Allows use of ALTER TABLE.
ALTER ROUTINE Alters or drops stored routines.
CREATE Allows use of CREATE TABLE.
CREATE ROUTINE Creates stored routines.
CREATE TEMPORARY TABLE Allows use of CREATE TEMPORARY TABLE.
CREATE USER Allows use of CREATE USER, DROP USER, RENAME USER, and REVOKE ALL PRIVILEGES.
CREATE VIEW Allows use of CREATE VIEW.
DELETE Allows use of DELETE.
DROP Allows use of DROP TABLE.
EXECUTE Allows the user to run stored routines.
FILE Allows use of SELECT... INTO OUTFILE and LOAD DATA INFILE.
INDEX Allows use of CREATE INDEX and DROP INDEX.
INSERT Allows use of INSERT.
LOCK TABLES Allows use of LOCK TABLES on tables for which the user also has SELECT privileges.
PROCESS Allows use of SHOW FULL PROCESSLIST.
RELOAD Allows use of FLUSH.
REPLICATION Allows the user to ask where slave or master
CLIENT servers are.
REPLICATION SLAVE Needed for replication slaves.
SELECT Allows use of SELECT.
SHOW DATABASES Allows use of SHOW DATABASES.
SHOW VIEW Allows use of SHOW CREATE VIEW.
SHUTDOWN Allows use of mysqladmin shutdown.
SUPER Allows use of CHANGE MASTER, KILL, PURGE MASTER LOGS, and SET GLOBAL SQL statements. Allows mysqladmin debug command. Allows one extra connection to be made if maximum connections are reached.
UPDATE Allows use of UPDATE.
USAGE Allows connection without any specific privileges.

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DataGridView单元格显示多行

作者:freethy 发布于:2012-6-28 13:31 Thursday

第一、设置RowsDefaultCellStyle的WrapMode属性值为true(表示支持多行显示)

第二、设置AllowUserToResizeColumns属性值为true(表示用户拉大行高)

第三、设置AutoSizeRowsMode属性值为AllCells(表示所有单元格自动调节单元格高度),属性值为DisplayedCells(表示当前单元格自动调节高度,可以提高性能。)

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Windows批量添加防火墙例外端口

作者:freethy 发布于:2012-6-15 13:31 Friday

echo off
cls
set var=30000
set end=30010

:continue
set /a var+=1

echo add port %var%
netsh firewall add portopening TCP %var%  ftp_data_%var%

if %var% lss %end% goto continue

echo complete
pause

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IIS FTP PASV模式下更改端口范围

作者:freethy 发布于:2012-6-15 13:31 Friday

IIS FTP里的PASV模式下默认端口范围 1024 - 65535,连接时会从中随机选择到响应。如果该值未指定,或被设置成空字符串,则将使用 Winsock 指定的默认值 1025-5000。如果指定了该属性,则 FTP 将验证的有效范围从 5001 到 65535。 要限制这片超大端口的范围,可以用IIS管理实用程序Adsutil.vbs.

cd c:\Inetpub\AdminScripts
adsutil.vbs set /MSFTPSVC/PassivePortRange "8900-8909" (例:开放指定的10个端口)
重新启动 FTP 服务
注意:如果开了防火墙,还必须添加以上端口.

 

Windows批量开放防火墙例外端口方法:http://www.freethy.cn/post-24.html

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