Bala-Krishna

Get Free License Key for Panda Security 2010 & Kaspersky Internet Security 2010

Bala Krishna — Thu, 22 Oct 2009 02:40:49 +0000

Kaspersky and Panda Security giving one year free license on the occasion of Windows 7 launch. Windows 7 is most awaiting operating system will be releasing for public on 22-oct-2009.

To grab the offer just follow below link:

Fix WordPress RSS Feed XML Parsing Errors – XML or text declaration not at start of entity

Bala Krishna — Tue, 20 Oct 2009 12:41:37 +0000

Today, i discovered that my blog feed was showing error in Firefox and other browsers. This error comes if white space of empty line at the start of xml feed content. Your xml feed content should start with xml declaration without white space or empty line. Blank lines or white space can be introduced by theme code, plugins, wordpress code or wordpress configuration file. A quick fix is check files you have recently edited.

How to Fix

Deactivate all plug-ins loaded and activate plug-in one by one to catch exact plug-in creating problem.
Try disabling wordpress cache plug-ins. Wordpress cache plugin don’t work well with some hosting.
Check your theme files, wp-config.php file for blank lines. It is hard and time consuming to check all wordpress core files. Thanks yo fiyaga for usefull wordpress plugin “Fix RSS Feed” that automatically detect blank or white space in the wordpress core files.
Make sure to ping your feed in feedburner or similar service you are using.

Window 7 RC Installation Error Fix – No device drivers were found. Make sure that the installation media conains the correct drivers

Bala Krishna — Sun, 11 Oct 2009 09:32:46 +0000

If you are facing this error and could not find a solution then you are at right place. I hope what i am sharing here could solve your issue.

This error comes most likely due to corrupted installation media so to work correctly you just need to make sure installation media you are using is fine. So do the following to make sure your installation media is error free:

Make sure ISO image you have downloaded is not corrupted in transfer.
Make sure ISO image is not corrupted during transfer from one PC to another PC. (I am specially mentioning here because this was my case. I have downloaded ISO image on one machine but intended installation machine was different. so the transfer media such as USB hard disk or Pan Drive was used.)
Make sure your ISO image burned without error on DVD.

Now, next question is how you can verify downloaded ISO file. There are several way to do verify ISO file accuracy.

Try to extract iso file content in a folder. ISO files should be extracted without error. You can use WinRAR or Magic ISO to extract ISO image file content.
There is a chance to extract ISO file without error even if few files inside ISO are corrupted so you need to double verify image file. Follow next step for additional verification.
Download MagicDisk (Free Utility) and install in your system. MagicDisk is free virtual disk program that can mount any iso or nrg(nero image) to a Virtual CD. Try mounting downloaded image file from this utility. If image file loaded correctly in a newly created Virtual CD disk then your installation media is fine and you can burn ISO file into DVD media.
Make sure to check data validation after DVD burning so you can make sure DVD burned is error free.

Window 7 Gallery

CakePHP Call to undefined function vendor() Error

Bala Krishna — Tue, 06 Oct 2009 16:41:19 +0000

Vendor() function basically used to load third party library in CakePHP. This function have been deprecated in the recent CakePHP releases. The vendor function in earlier CakePHP releases has been replace with new App::import method that is more user friendly and allow you to include third party library in several ways.

To fix the issue simply replace vendor function with new method. New import method return boolean true or false depend on the library loaded or not. This is useful in some context. With new import method you have option to verify third party library loading and act accordingly so your application never fail.

Old Method

vendor('facebook/facebook');

New Method

App::import('Vendor', 'facebook/facebook');

Fix: Windows drives does not open by double click

Bala Krishna — Sun, 05 Jul 2009 17:35:33 +0000

This common problem happened in windows XP (as for as i experienced, may be found in other windows OS). When you click on any of your system drive you get open with dialog window instead of content of drive. I was living with this issue from long time but could not even think to solve this issue because i was extremly busy and i was able to open drive with single right click explore function. This issue caused by some of the virus programs. The virus program change or create new registry value to block or restrict user access to computer drives.

There are several option available to fix this issue. You can use one of them that works for you.

1) Delete autorun.inf

This file created by virus in the root of each drive. This file initiate operation or any illigal activity when you try to open any of the drive. Virus make this file by default hidden so that you can see file without spy glasses. To get rid of the issue you just need to delete this file from each drive. Follow each steps below to correct issue. Make sure to restart system to change take effect.

Open Start>>Run and type cmd and press enter. This will open command prompt window.
Type cd\ and hit enter to move on root of drive.
Type attrib -r -h -s autorun.inf to remove hidden, system and read-only attribute of file.
Type del autorun.inf to delete file from drive.
Repeat above steps for all drives. To move on another drive simply type drive letter(eg- d:) and hit enter.

2) Run FixDrive Utility

If you are unable to follow and apply above step then simply download utility provided by winhelponline.

Click on the FixDrive.zip to download file on your PC
Extract content of file in a folder
Run FixDrive.exe
Select the drive-letter from the list
Click Fix to resolve issue
Application notify you if problem present with drive

What is Cryptography

Bala Krishna — Sun, 28 Jun 2009 12:28:46 +0000

Cryptography is the process of transforming digital information into an unintelligible form so that it can be sent over unsafe channel of communication. The transformed data called cipher text that is in the form that nobody can understand. The transformation process handled by a data key. This key required to transform cipher text into original state. The stage of conversion of the digital data into unintelligible form is called Encrypting or Encoding. Reconverting the encoded data back into the original form by the authorized person using the appropriate key is called decrypting or decoding. Below is basic diagram explaining encryption and decryption process.

ENCRYPTION:

Ascii Text Or Data –> Algorithm –> Secret Key –> Cipher Text

DECRYPTION:

Cipher Text –> Algorithm –> Secret Key –> Original Data

Encryption Algorithm

Transposition Cipher
Code System
Data Encryption Standard (DES)
RSA Approach

This post is brought to you by Bala Krishna Tech Update Blog.

How To Unintruppted/Unattended Complete Folder Copy With DOS

Bala Krishna — Sun, 17 May 2009 16:07:11 +0000

The copy command is primary command available in Dos as well as Linux operating system for organizing and making copies of files. Working with dos is relatively faster than working in windows environment. However copy command have several drawback. You can not copy complete disk or a folder with files and sub-directory in folder with copy command. Moreover copy process will be halted if problem persist in copying files in destination location. Even windows explorer does not ask to retry or skip file in case of problem. Linux is better in this case, at-least Linux ask user to retry, halt or skip file.

Dos support external XCOPY command for this purpose and support numerous switches. I use following command with switches to create a replica of one location.

C:/> xcopy d:\*.* h: /s /c /h

This command copy all files in D: drive to H: drive. The /s switch used to copy all directory and sub directories. /c used to continue copy with rest of directories and files even if error occurred. /h used to copy hidden and system files. Use /Y to overwrite file without prompt if file already exist in the destination directory.

xcopy support following switches that you can use for your own conveyance.

/A	Copies only files with the archive attribute set, doesn’t change the attribute.
/M	Copies only files with the archive attribute set, turns off the archive attribute.
/D:m-d-y	Copies files changed on or after the specified date. If no date is given, copies only those files whose source time is newer than the destination time.
/P	Prompts you before creating each destination file.
/S	Copies directories and subdirectories except empty ones.
/E	Copies directories and subdirectories, including empty ones. Same as /S /E. May be used to modify /T.
/V	Verifies each new file.
/W	Prompts you to press a key before copying.
/C	Continues copying even if errors occur.
/I	If destination does not exist and copying more than one file, assumes that destination must be a directory.
/Q	Does not display file names while copying.
/F	Displays full source and destination file names while copying.
/L	Displays files that would be copied.
/H	Copies hidden and system files also.
/R	Overwrites read-only files.
/T	Creates directory structure, but does not copy files. Does not include empty directories or subdirectories. /T /E includes empty directories and subdirectories.
/U	Copies only files that already exist in destination.
/K	Copies attributes. Normal Xcopy will reset read-only attributes.
/N	Copies using the generated short names.
/O	Copies file ownership and ACL information.
/X	Copies file audit settings (implies /O).
/Y	Suppresses prompting to confirm you want to overwrite an existing destination file.
/-Y	Causes prompting to confirm you want to overwrite an existing destination file.
/Z	Copies networked files in restartable mode.

FileZilla Disconnect Problem Fix

Bala Krishna — Sun, 12 Apr 2009 07:19:37 +0000

FileZilla is great open source ftp software. Everyone using it likes its design and user friendly interface. However, it lacks multiple ftp session features. This is very required feature for the users who want to connect to multiple ftp sites at the same time without disconnecting current session. I hope multiple ftp session will be added in upcoming releases. I personally use multiple instances of FileZilla when i want to connect with more then two website at the same time. You can also use this until we get this feature added in FileZill future releases.

Lets come to disconnect problem. The problem is big pain for the user who don’t want to away from FileZilla. Here is the work around i did to overcome this issue.

Go to FileZill Settings (Edit – > Settings)
Select Connection From Left Panel
Check “Send FTP Keep Alive Commands” Check Box
Again Select Transfers From Left Panel
Set Timeout to Zero(0) Seconds

MySQL Too Many Connections Error Problem & Fix

Bala Krishna — Sun, 01 Mar 2009 07:22:54 +0000

If you are getting� Too many connections error when you try to open your website in browser, It means all available connection used by other script or mysql process. Number of connection to mysql server determined by setting in mysql conf� file.� By default,� it is 151� for MySQL 5.x and 100 for MySQL 4.x.� To change setting, open mysql conf file. In Linux it can be found (/etc/my.cnf) and in windows within installation folder. Find max_connections setting under [mysqld] section. This setting must be within [mysqld] section. Change setting which is suitable to you.

[mysqld]
max_connections=200

There are several reason that cause server to raise this error:

Persistent Connections: This is common cause of this error. If script uses persisit connection and script does� not close connection even if script terminates. To avoid this problem, try using mysql_connect() instead of mysql_pconnect(). Check this setting in third party script such as osCommerce. You can turn off this setting in php.ini file. Script using persist connection will use non-persistent connection without any warning or error if persistence connection disabled.

Server administrators can disable persistent connections for PHP scripts in php.ini file:

[MySQL]
; Allow or prevent persistent links.
mysql.allow_persistent=Off

Lower MySQL Connect Timeout: Check your mysql connect timeout setting. By default it is 60 seconds and php setting lowering below the dafault setting.

For example: following setting in .htaccess php_value mysql.connect_timeout 25

osCommerce� Setting:

The osCommerce setting mentioned by ?varo is in the catalog/includes/configure.php file:

define(’USE_PCONNECT’, ‘false’); // use persistent connections?

It defaults to true, so mysql_pconnect() is used, and you get the error message “Warning: mysql_pconnect(): Too many connections …” Change to false for mysql_connect() to be used.

Dos Directory Commands With Switches

Bala Krishna — Sat, 28 Feb 2009 13:00:26 +0000

Dos directory command display files and directories in the current directory. If� information will more than 24 rows then information will scroll and you can see only last 24 rows information. Dos directory command support various switches to filter and format results.

Dir/p - Display directories and files in the current directory page wise. If� list is in more than 24 rows then a message “Press any key to continue” display to see list on next page.

Dir/w – Display the files and directories in 5 coulmns. Directory will display in [] brackets to standout.

Dir/l – Display files and directories in lower case.

Dir/ad – Display only directories.

Dir/od – Display the files and directory in date wise ascending order.

Dir/o-d – Display the files and directory in date wise descending order.

Dir/os – Display the files and directory in size wise ascending order.

Dir/o-s – Display the files and directory in size wise descending order.

Dir/oe - Display the files and directory in extension wise ascending order.

Dir/o-e – Display the files and directory in extension wise descending order.

Dir/on - Display the files and directory in alphabetic ascending order.

Dir/o-n – Display the files and directory in alphabetic descending order.

Dir/s – Find the file in directory and sub-directories and display path of file.