Wednesday, September 28, 2011

Tutorial - Virtual Machine with Virtual box on Windows

I'll write about virtual machine in Windows. Sometimes, there is a particular program that we want to run but is plagued with compatibility Operating System (OS). For example there are applications that we know first run on WinXP but now after a try again in Win7 not be opened (crash). Or even it could also have a special application we need to work, but  application can only run on Windows while Linux-based computer.

Of course, we can use the system to plant two Dual Booting OS in one computer. But sometimes this method is less practical because more needs to be prepared such as set partitioning, manage files, etc.. In addition, if one day we already do not need a second OS, then the uninstall process was not easy. All too often ended up reformatting, and that means set the partitions and file again.

Actually, there is one practical solution to this, that is by using VirtualBox. With VirtualBox, you can as if making a new computer ( virtual machine ) and install it with the OS you want (Guest OS). More great again, you can run both at the same time, moving from guest to host and vice versa with ease. If it does not need anymore, you just delete it (remove) the virtual machine without a complex process.

Well, in this article I will explain about how to create a virtual machine using VirtualBox. Because many things to be explained, for convenience, so I split them up into several sections, namely:Download & installl Virtual Box, Virtual Machine & Guest OS, and the last is the setting. In this example, I will install WinXP in a virtual machine that will be created. As for his own VirtualBox I run across operating systems Win7. So, the Guest OS and Host OS = WinXP = Win7. Here are the steps:


First download the installer once its in here . Select according to the type of OS you use.

1. After that run its installer file. Click Next> when VirtualBox Setup Wizard appears.

2. Then you can choose the installation location. Click Next> to continue.

3.Choose anywhere you want a shortcut is created, then click Next>

4. Usually will appear warning that the connection to the network is disconnected while on during the installation process. Just click Next>.

5. Click Install to begin the installation process.

6. If UAC appears, click Yes.

7. Up here you've managed to install VirtualBox. Click Finish to run the VirtualBox program


Next you need to do is make her a virtual machine. Click New on VirtualBox Manager to get started. You will be greeted by the New Virtual Machine Wizard. Click Next to continue. Here you will choose what type of OS you want to install as guest OS. In this example we will install WinXP. Click Next when done select the type of OS. You can determine how much memory (RAM) for the virtual machine later. Move the slider to the desired number, then click Next.For the first time, make sure you men-centang/contreng Boot Hard Disk and also select Create new hard disk, If so, click Next. Next you will go to the Create New Virtual Disk Wizard. Click Next to continue. You can choose whether the size of virtual hard disk later this magnitude can change or always remain. For savings should you choose a dynamically expanding storage. Click Next if you have selected. Here you can choose the location where the virtual hard disk will be created, it also determines the maximum size hard disk (hard disk maximum size). VirtualBox by default suggested size is 10 G. But you also can set smaller as long as you believe that size is sufficient for your needs later. Click Next. This is a Summary of the Create New Virtual Disk Wizard. Click Finish. It appears that you already have a virtual machine called WinXP, although it is still empty. Now the next task is to fill this virtual machine with the Guest OS. Double-click on the entry to start WinXP.

You will be greeted by First Run Wizard. Just click Next.Here you will select the media you will use as a source installation. In this example I use WinXP CD (bootable of course), which I enter into Drive E (DVD ROM). If so, click Next. This is a Summary of the First Run Wizard. It's good here you have prepared her to drive installer that you selected earlier. Click Finish to begin the installation process. Display WinXP installation will start out. Press Enter to continue. Select Format the partition using the NTFS file system, then press Enter. Please wait until the WinXP installation process is complete. 

Congratulations, you now have a WinXP Guest OS on your virtual machine! Before you start "playing around" with this new virtual machine it's good to do some changes to the settings used to make you more comfortable in using it later. Some settings require the virtual machine in a non-active, some can only be done in the Guest OS Safe Mode. Thus, to present first shutdown the Guest OS you.


This time will discuss about some important settings of your order the more comfortable in using your virtual machine. Make sure your virtual machine is turned off (powered off), then double-click to turn on and be prepared to press F8 as we will go into Safe Mode.

Choose Safe Mode, then Enter twice.
After entering Safe Mode, click Yes to close the window notification.
In the VirtualBox menu, select Devices -> Install Guest Additions.
It would appear the Windows Explorer . Double-click VBoxWindowsAdditions.
You will be greeted by the VirtualBox Guest Additions Setup Wizard. Click Next> to continue.
Select the installation location and click Next>.
If you plan to run an application in the Guest OS that require Direct3D (games for example), then make sure the Direct3D Support selected. If you already click Install.
Guest Additions installation process was completed. Click OK.
Click Finish to restart and get into WinXP as normal.
Next we'll create a Shared Folders. Usefulness is as a place to exchange (transfer) files between Guest and Host. The trick is to select Devices -> Shared Folders.
Click the Add button on the right side of the window.
In the Folder Path, select Other.
Specify the folder where you want shared.
Then select Auto-mount that folder directly at-shared automatically at startup.
Rekapnya be seen here. You also can create more than one Shared Folders if you wish. Click OK to finish.

Shared Folders will only begin to be used if you have to restart. But for now the Guest OS shutdown before you because we will make changes in the last settings via VirtualBox Manager.
Click Settings on the menu VirtualBox Manager.

Select the System tab on the left. Well here you can make settings memory (RAM) and also the Boot Order. In order for fast booting, select Hard Disk as the Boot Order first priority.

Select the Display tab and you can change the amount of Video Memory (VGA Card) and also activate the Enable 3D Acceleration feature. Click OK if it is.

Next run the virtual machine again. After entering Windows, try running Explorer. It appears that the Shared Folders now can be accessed.

Applications that can not be opened in Win7 are now able to run. 

an explanation of the technical steps to create a virtual machine and its installation with the Guest OS using VirtualBox. In this way, we seemed to have a "new computer" is ready to run. In the world of IT, many benefits to be gained by using this VirtualBox. A Java programmer who want to create a multi-platform applications, can use VirtualBox to test programs in various OS (Windows, Mac, Linux, FreeBSD, etc.).

Or someone who is studying to be a hacker, usually also will create a virtual machine to test the efficacy of scripts or artificial virus, without having to worry about major OS that is being used also infected. You can also experiment with VirtualBox it suits your needs.

How to accelerate Hard Disk Performance?

Hard disk filled with lots of data in it will make the hard disk become slow in reading data stored on the computer. This is because the files contained on the hard disk are spread in several parts of the disk so it needs a lot of time to access any part of the data file.

Here are 5 tips that may help you in member computer's hard disk to increase performance and speed in reading data from hard disk.

1. Removing Duplicate Files from Hard Disk
With so many files contained in the computer, then chances are there are a lot of the same data will be even greater. Usually this is found on mp3 files that you often copy and paste with any, regardless of whether the track already exists or not on your computer.

Maybe it will take considerable time to search for duplicate data manually, but using free software to find duplicate data may be helpful to wash the computer from the data the same data.

2. Delete Temporary Files / Temporary Files
Windows makes a lot of Temporary Files as long as you use a computer. You may often remove them, but some diantranya will continually be made at the time you start your computer, just as browsing the Internet, installing software and more. Some examples of these temporary files are: file fragments, Browser Cache, Memory Dumps, Log Files, Cookies, Recycle Bin.

You can use a set of free software to clean Temporary Files / Temporary Files.

3. Defragment the Hard Disk
Defragment your computer's hard disk is one effective way to accelerate the performance of your hard disk. It is recommended that you defragment your computer regularly (not too often and do not use too many different software defragment diff).

Many free software to defragment the computer's hard disk, previously I've written an article about this click the link to.

4. Find and Fix Hard Disk Errors
Defragment may not be enough if you have any hard disk that has begun to wear: D. To find out the hard disk that errors can be done with the following features of the default Windows

* Open windows explorer
* Right click on the disk partition you want to know his error
* Select the Tools menu and then Properties
* Then click on Check button now

Or you can use Windows software for finding and Surface Scanner Scan BadSector On Hard disk
5. Delete Data Unimportant
Perhaps unconsciously you have many files such as piling, pictures or photos, songs, videos b ****: D and others,.

Difficult indeed to remove a file from the computer, because sometimes no matter how small files could be very useful when you need it, but if not removed some of it will make your hard disk capacity becomes small.

How can we save Secret Folders on our Computer?-The Best way

Humans have the instinct to cover up and hide everything that he felt violated social norms,religious norms, laws, etc.. Because in humans endowed with reason and conscience, the man tried to prevent her from shame, despised people, suffering etc.. Here is a trick to hide files /folders your computer.

One of the classic social phenomenon "mistress" sometimes brings its own difficulties for the aktifisnya. I will help solve your problems, but I'm just providing a way to save photos of your wife, if saving the person, wow, I do not have the experience, and this is purely your affairs,(ihik ... hik .... hik).

We will learn to create folders TRICKS secret / special / personal, there are some tricks that we  may never wear them. Tricks to make it a special secret folder using Notepad which is on our computer. (who do not know can CLICK: start / all programs / accessoris / Notepad).

Generally, we must have had personal files and secrets that do not want to be known by someone else, well the trick would be very useful, for example, we have important documents, diaries, letters scanner an first love, and maybe even an image file / video that are less polite,(you know who I mean .... he .. he. must understand, people of Indonesia.)

Stages and do this:

1. Open Notepad.
2. Place a series of code written below or copy and paste directly into a notepad that has been opened.

indonezian kunci folder
if EXIST “Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}” goto UNLOCK
set/p “cho=>”
if %cho%==Y goto LOCK
if %cho%==y goto LOCK
if %cho%==n goto END
if %cho%==N goto END
echo Invalid choice.
ren Locker “Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}”
attrib +h +s “Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}”
echo Foldernya dah terkunci
goto End
set/p “pass=>”
if NOT %pass%== rahasia goto FAIL
attrib -h -s “Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}”
ren “Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}” Locker
echo Folder Unlocked successfully
goto End
echo Invalid password
goto end
md Locker
echo Foldernya berhasil di buat
goto End

3. Note the secret text in bold above is a password that will be used to open the folder that we will keep. This password can be changed with a series of letters or numbers that we like and should always be remembered.

4. After changing the password then click File then click Save As, then change the Save As Type to All Files.

5. We fill in the file name extension *. bat for example write (Secrets of my soul) and then Save.

6. Please double click on the file that we had saved with the extension *. bat will be out incmd.exe (black box).

7. Then we write the password that was entered earlier then press ENTER. Search that later there appeared a folder named Locker nah you can save your personal files there, with copy and paste the ordinary.

8. The final step if sudahselesai, click again *. bat file that you saved earlier and write "y" then

Brief and Understandable History of SEO (search engine optimization), blog and Benefits

Search Engine Optimization, or commonly known as SEO it was already so well known, studied, etc. by the bloggers. It is quite understandable because of the existence of a blogger  one of them will be determined by penguasaanya SEO blog. There's even an opinion that states: mastering SEO means 50% of the online world already digenggaman tanggan. Why is that?

SEO can be given meaning as a set of resources and efforts made to improve the quality of the articles to be able to occupy the top position on search engines first page of search results with specific keywords. The goal there is no other page has a tremendous opportunity to visit search engine users, so that traffic will blog.

Because of such benefits, and as more online media usage in this world, the SEO becomes increasingly important and costly merchandise. Many products and business transactions born of SEO. SEO Company with any merchandise popping up, and it is increasingly brisk competition among bloggers worldwide. The minor question is since when SEO is known?

Danny Sullivan argued that the term SEO was first introduced on July 26, 1997 by a spam message posted on Usenet. The algorithm of search engines at the time was not yet sophisticated and complex that is still very easy to manipulate. Search algorithm based on the information through the meta tags on their blogs html code. Webmaster manipulated by writing the keyword that does not comply with the contents of the blog, so that search engines rank of the blog
Larry Page and Sergey Brin, a Ph.D. student of computer science at Stanford University, overcome by building Back Rub, a simple search engine. Complex mathematical algorithms function calculation result of the combination of links that lead to a blog page with analysis of the quality of each link, then the algorithm is called Page Rank.

Based on the mechanism of Page Rank, it is ascertained that a blog page that ranks high is that many of the pages linked by other blogs. The higher the Page Rank value when the blog page linked by a link from high-quality sites like Yahoo, DMOZ, etc..

In 1998 Page and Brin founded Google, which is the development of BackRub, Google finally gain public confidence in its success provides Internet users with high-quality search results, fast, and relevant. Then a standard good page rank for webmasters to obtain Page Rank values ​​as high as possible.

Along with the development of search engine optimization blog then expanded in order to look good in front of search engines. The blogger (website manager) even manipulate, etc to win a competition. But hence also the search engines is growing with more perfect. At the beginning of these developments is the webmaster submits their blog address to the Search Engine, then SE responded by sending a web crawler or spider go to the blog in question. By working through page by page, then download the page to be indexed and stored in a database.

Then the program index search for information in these blogs to determine the level of page rank in accordance with the provisions of the formula search engine algorithms. As the increasingly tight competition to win the SEO bloggers bloom then find a way clever, evil, black to simply outsmart the system search engine. Its interests only one that won the top position on search engine result page.

Party search engines also continued to refine the system, and they seemed to compete with the bloggers from time to time. War of the ability to repair the system with the seeker system weaknesses eventually happen, until this moment.

Generally search engines designed a system to index the blog on the basis of which is based on several factors, among others:
1. The domain name
2. Title
3. Html Tags
4. Keywords used
5. Image file name (alt attribute)
6. Frequency of website updates
7. Sitemap
8. Keyword density (density)
9. etc.

From some of the above of course the fighters struggle SEO can menyesuakan direction. Thus the activists surveyed SEO keywords, optimization through SEO Onpage, optimization through SEO Offpage and others. Similarly, brief exposure of the history of SEO, may benefit.

Free and easy download GPSViewer - GPS for Mobile Data Viewer

GPSViewer is GPS data viewer for mobile phones that will display a comprehensive report on accurate statistics on geographical location.Altitude, latitude, longitude, speed, direction of movement, number of satellites and other parameters or coordinates appear on your phone screen.

This application is compatible with Huawei, Casio, BenQ Siemens, HTC, GT Mobile, Hyundai Mobile, Kyocera, LG, Lenovo, Motorola, Nokia, Panasonic, Samsung, Siemens, Sharp, Vodafone, ZTE, etc..

In short, this application works with any phone that supports CLDC 1.0 and MIDP 2.0 Minimum and communication with Bluetooth or data cable.

How to enable Telnet Using the Command Prompt in Windows 7?

In Windows 7, Telnet Client and Telnet Server is not active for the default setting. However, Telnet Client and Telnet Server can be activated through commands typed at the CommandPrompt (CMD).

  • Here's how to enable the Telnet Client and Telnet Server in Windows 7
Open a command prompt via the start button and type CMD

type the following command:

pkgmgr / iu: "TelnetClient" (to enable the Telnet Client)

pkgmgr / iu: "TelnetServer" (To enable Telnet Server)
  • A second way to enable the Telnet Client and Telnet Server in Windows 7

Click on the start button and type appwiz.cpl in the search box. Click Turn Windows features On or Off from the right panel Find Telnet Telnet Server and Client, then check the box next to it. Click OK and restart the computer if necessary

What are the Applications hidden in windows xp?

Application is hidden in windows xp
Here are some applications you may not know who is on windows. If you do not know the location where you can open it by using the command prompt.

Character Map -- charmap.exe

Clipboard viewer -- clipbrd.exe

Dr.Watson -- drwtsn32.exe.

Character Editor -- eudcedit.exe

Bluetooth Transfer -- fsquirt.exe

Windows Services -- mmc.exe

Telnet Client -- telnet.exe

Group Policy* -- gpedit.msc

IExpress -- iexpress.exe

Registry Editor -- regedit.exe

Free and portable CCleaner Download

In this article I discuss about CCleaner, a small application that can clean your computer of junk files so the computer can be faster. Some things that can be cleaned by CCleaner include Temporary files, history, cookies, Autocomplete form history, index.dat. download history, Recycle Bin, Recent Documents, Temporary files and Log files.

for those of you who love this application and want to carry anywhere with flash disk, it is available it is also a portable version which you can download

Download CCleaner portable

Good Tips for choosing a mobile device modem

Currently mobile modem is no longer the stuff that is difficult to find. you can find it on almost any mobile phonestore and a laptop, other than that some mobile operatorsalso sell mobile modem in one sim card mereka.beberapapakaet with points to consider in choosing a modem device.

1. support networks
know what type of network supported by mobile modems. ifgsm check whether to accept the GPRS network, UMTS and HSDPA. if the network cdma check whether can receive EVDO network

2. speed data
today many mobile modems that offer speeds up to 7.2 Mbps. but you need to consider is themaximum speed cellular network in Indonesia is only 3.6 Mbps so that excellence becomes notbermanfaat.meskipun Thus the decision to choose to remain in the hands of outside anda.jikaindonesaia, just maybe there already supporting mobile networks at 7 , 2 Mbps

3. type inter face
type mobile interface consists of a PCMCIA modem and USB m.hampir all lapto providePCMCIA and USB slots but nowadays so many have left and switch to USB PCMCIA

4. type of operating system
note the type of operating system that can support mobile devices that your modem ispilih.apakah Windos xp, vista Linux MacOS or different variants

Easy and free way to Convert PDF files into Word Documents

Convert PDF files into Word DocumentsHelloPDF PDF to Word Converter is one of more software for business convert PDF files into Word documents. This software is freeware and you can download for free.

HelloPDF PDF to Word Converter can extract text, images from PDF files into Word Doc file and keep tatak original file pathname. This application can convert all the pages, or only certain pages of a PDF file. You do not need meninstall PDF Reader or Word on your PC to be able to do the conversion.

Features :
  1. Convert PDF to Word and preserve the original layout of your PDF in an editable Word Document.
  2. Extract text labels, graphics, shapes from PDF file into Word Doc file.
  3. Convert all the pages, or partial pages of PDF file to Word file.
  4. Support Adobe PDF 1.0 - 1.6 formats.
  5. Can automatically open the output Doc file when the conversion is done.
  6. Several PDF to Word conversion options are available for a better result.
  7. Convert in a high speed.
  8. Easy to use software.

Tips for Speeding up the computer booting process

Turning on the computer quickly is the dream for computer users, The following may be used as an alternative to faster computers in the affairs of the boot.

Open the Run window type in msconfig, after the System Configuration Utility opens. On the BOOT.INI tab, check the "/ NOGUIBOOT". This will shorten the boot time by removing the Windows startup Startup tab, selection items repeated a minimum that is needed less and less that run has been accelerating the process of booting and then Go to System Properties, select the Advanced tab. Resetting the Performance option. Then select "Adjust for Best Performance" in the Visual Effects tab, Remove wallpapers and minimization of the number of desktop icons also can speed up your PC
, Eliminating the sound on the Windows Start event will also speed up the boot process, select "No Sounds" in the sound scheme.
More and more number of fonts installed will increase your PC's workload. Windows by default include a number of less than 100 fonts. Keep the number of fonts installed on the range of 150 fonts. The last time these drivers are not used and remained influential well into the speed for the easiest way to use additional utilities such as Driver Cleaner.

Important notes about Network cables

There are two types of cable commonly used in the manufacture of the first Network Cable is a twisted pair of UTP (unshielded twisted pair) and STP (shielded twisted pair) then the second coaxial cable. But now it is often used in making the network is the type of UTP cable

Known 2 pieces of this type of UTP cable connection, which is a straight cable and crossover cable. The function of each type of connection is different, straight cable used to connect computers to the hub / router / switching, while the crossover cable used to connect computers to the computer and also connect from the hub / router / switching to a hub / router / switching

In accordance with International Standards are the colors of the existing wires in UTP cable that is White Orange, Orange, White Green, Blue, White / Blue, Green, White Chocolate, Chocolate. and connectors are used for this cable is RJ45

To facilitate it in the manufacture of straight cable and crossover cable Suppose we have 2 types of cable arrangement which is type A with Structure White / Orange, Orange, White Green, Blue, White / Blue, Green, White Chocolate, Chocolate And White Namely Type B Green, Green , White / Orange, Blue, White / Blue, Orange, White Chocolate, Chocolate.Where is said is that if the tip of a straight cable with one end only using one type (A only or B only), while said cable crossover where two ends of UTP cable manggunakan different cable (one end using a Type-A and other end use Type B)

How to merge multiple images into one image - Java ImageIO

My previous post shows how to split an image into chunks. Now let's see how to merge multiple images into one image. Say we need to concatenate following four image chunks. I got these chunks by splitting the image in the right hand side, using the image splitter.

Following code shows how to concatenate the image chunks above into one image.

  1. int rows = 2; //we assume the no. of rows and cols are known and each chunk has equal width and height 
  2. int cols = 2; 
  3. int chunks = rows * cols; 

  4. int chunkWidth, chunkHeight; 
  5. int type; 
  6. //fetching image files 
  7. File[] imgFiles = new File[chunks]; 
  8. for (int i = 0; i < chunks; i++) { 
  9. imgFiles[i] = new File("archi" + i + ".jpg"); 

  10. //creating a bufferd image array from image files 
  11. BufferedImage[] buffImages = new BufferedImage[chunks]; 
  12. for (int i = 0; i < chunks; i++) { 
  13. buffImages[i] =[i]); 
  14. type = buffImages[0].getType(); 
  15. chunkWidth = buffImages[0].getWidth(); 
  16. chunkHeight = buffImages[0].getHeight(); 

  17. //Initializing the final image 
  18. BufferedImage finalImg = new BufferedImage(chunkWidth*cols, chunkHeight*rows, type); 

  19. int num = 0; 
  20. for (int i = 0; i < rows; i++) { 
  21. for (int j = 0; j < cols; j++) { 
  22. finalImg.createGraphics().drawImage(buffImages[num], chunkWidth * j, chunkHeight * i, null); 
  23. num++; 
  24. System.out.println("Image concatenated....."); 
  25. ImageIO.write(finalImg, "jpeg", new File("finalImg.jpg"));