How to Flush DNS Cache in Windows XP

If you have a domain and set a new nameserver for your domain, your computer will not access the server behind your new nameserver. It’s happened because your computer cached the DNS so when you trying to access your server using the domain, it will always redirected to previous server. The DNS cache  will be updated automatically after period of time, max time for this update is 2 x 24 hours.

To manually flush your DNS cache on Windows XP, you can use this command in command prompt. Open your command prompt by pressing Windows Button + R, then type cmd.

Use this command.

ipconfig /flushdns

Access CPanel behind company proxy firewall

I was having problem accessing my web server from my company, my company network only open port 80 for internet access. So it would be impossible if someone trying to do to access CPanel behind this firewall.

But there’s a way for us to access CPanel via port 80 on our server, there’s no change at all both side our network or server. To access CPanel behind company firewall we can go to http://cpanel.domain.com, replace the domain.com with your own domain. For example http://cpanel.leoganda.net

By using this technique we are bypassing the port on our server, and accessing the port 80 over CPanel. So we gain access.

The System Cannot Execute The Specified Program C++

Today I made a simple console application using Visual C++ 2008 and it was runs well on my development machine. But the problem occurred when I run the application on another machine, the error says “The system cannot execute the specified program“. I was guessing the problem occurred because of missing library or something, after short analysis both machine have the correct and the same library. So what’s going on??

I googled for this error and found this article, it explains how this problem occurred on compiled C++ application. There’s two type of build on VC++ ( Debug and Release), my application was built in debug mode and we can’t re-distribute the application on debug mode. The built program in debug mode only runs on development machine, so in order to distribute my app I should build my application in ‘Release’ mode. Time to switch from ‘Debug’ to ‘Release’ mode,

Open your Visual Studio->(Open Project)->Project->(project name) properties

select the Build Tab, in configuration option choose “Release”.

Rebuild your project, you will find “Release” folder, your released application is in there.

Simple Powershell FTP

With Powershell we can do FTP transaction really easy. The best feature from Powershell is we can use any dll library in our script, we can import .Net libraries and etc into our script. The script below is simple FTP to upload file to FTP server. In this script I’m using System.Net.WebClient to handle the file transfer.

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$ftpuser = "user"
$ftppass = "12345"
$ftpserver = "localhost"
$file = "C:\test.txt"
$filenewname = "test.txt"
 
$webclient = New-Object System.Net.WebClient
$ftp = "ftp://"+$ftpuser+":"+$ftppass+"@"+$ftpserver+"/"+$filenewname
$uri = New-Object System.Uri($ftp)
 
$webclient.UploadFile($uri,$file)

Powershell script sort list file

It’s pretty easy to sort an output from ls or Get-ChildItem using powershell, you can sort the output by name, length, and date.

Sort By Name

Get-ChildItem C:\ | sort -property Name

Sort By Size

Get-ChildItem C:\ | sort -property Length

Sort By Date Modified

Get-ChildItem C:\ | sort -property LastWriteTime

You also can reorder the sort output with “-descending”
example :

Get-ChildItem C:\ | sort -property LastWriteTime -descending

Python for Windows Mobile

Hello, right now I’m doing development some project using Python for my new company I’m working on. I thought Python will be boring, but Python changes my mind! As programming language Python is really simple and powerful. It can be run cross platform without compile anywhere. It runs well on my Windows and Linux, so I was thinking could I install Python on my Windows Mobile device? The answer is YES! I’m using Windows mobile 6.1 and runs Python perfectly on it. If you want to install Python CE on your windows mobile device, you can get the CAB file in here. It’s free.

Setup was unable to open information file setupqry.inf

Hi there, today I was trying to install IIS on my local computer and I got an error “Setup was unable to open information file setupqry.inf Contact your system admin. The specific error code is 0x2 at line 0“.

This problem occured after I upgrade my Windows XP SP2 to SP3.

The error showed up because some file are missing when system upgraded to SP3. Here’s the list of missing file.


setupqry.inf
optional.inf
msnmsn.inf

setupqry.dll
msgrocm.dll
ocmsn.dll

Paste those inf file to your Windows\inf directory and paste the dll file to windows\system32\setup. It’s fix my problem.

You can download those file here, just extract it to your windows directory.

Auto Post Using Javascript

Hi there, a few weeks ago I was doing research about auto post from webpage to paypal payment page. The basic idea is the visitor fill the form, then when the visitor submit the form we will store visitor data input to database. Once data stored in database the page will be automatically redirected to paypal website. It’s pretty easy, we will use JavaScript to do auto post. I wanna make this article as simple as possible, I just wanna show how to do auto post with Javascript. Continue reading Auto Post Using Javascript