Sunday, January 31, 2010

How to Recover/ Hack / Reset Windows NT/2000/XT/Vista Password Using Ubuntu Live CD

You can easily hack Windows Password with Ubuntu. You may need to reset an admin password in windows (NT/2000/XT/Vista) for many reasons, such as you have  forgotten it or you  need to repair and don't have access to the admin password. You can Easily Reset Windows password with Ubuntu.


A little knowledge in Command Line , An Ubuntu Live CD. And a Wonderful package called chntpw.

Open a terminal
$ apt-get install chntpw

Chntpw is a program designed to overwrite Windows NT/2000/XP/Vista
SAM password.

Mount your Windows partition with read/write support

Then you need to locate (use your Command line Skills)  SAM file which for Windows 2000 and XP is normally located at windows/system32/config or winnt/system32/config.

Once inside the ‘config’ folder , issue this command:

$ sudo chntpw -h              for help 
$sudo chntpw -l SAM       for list of windows users
$sudo chntpw -u USERNAME  SAM    for reset password

it is recomended to reset the password to BLANK.

Friday, January 29, 2010

Mirror Your Remote Server Graphically with Grsync in Ubuntu Linux

rsync is an open source utility that provides fast incremental file transfer.  rsync uses the "rsync algorithm" which provides a very fast method synchronization of  two server.
Grsync is the Graphical Front-end for rsync.
Some features of rsync include

* can update whole directory trees and filesystems
* optionally preserves symbolic links, hard links, file ownership, permissions, devices and times
* requires no special privileges to install
* internal pipelining reduces latency for multiple files
* can use rsh, ssh or direct sockets as the transport
* supports anonymous rsync which is ideal for mirroring

Install grsync in ubuntu
Open a terminal and type
$apt-get install grsync
or use Synaptic package manger

Thursday, January 28, 2010

Letters and Numbers Learning Game for Kids in Ubuntu Linux : lletters

GTK letters-learning game for small children . It is specialy made for  children 2 and up, and is a learn with  fun game. It helps younger children learn their letters and numbers, while older children will improve their spelling, and vocabulary skills. It will also helps your kids to develop important keyboard and mouse skills too.

Open a Terminal and type
$ sudo apt-get install lletters
or use Synaptic Package manager

Tuesday, January 26, 2010

How To hide Apache2 version Information from hackers

Some times we need to hide apache banner information, because hackers check version details, before attacking a sever, If you close this door, it is more difficult for them to exploit any system holes and thus making vulnerability scanners work harder and in some cases impossible without knowing version information.

Do the following steps
Modify /etc/apache2/apache2.conf
Change the ServerSignature on to ServerSignature Off
Change the ServerTokens full to: ServerTokens Prod
Restart Apache: /etc/init.d/apache2 restart

Monday, January 25, 2010

How to make Your Ubuntu Linux Enegy Efficient using PowerTop

Since version 2.6.21, the Linux kernel has introduced a   feature called tickless. the kernel no longer has a fixed 1000Hz timer tick. This will give a dramatic  power savings because the CPU stays in low power mode for longer periods of time during system idle.
A Nice handy tool, PowerTop has been created for reducing the Power Usage of Linux.  This application will help to find  the software components that are preventing optimal usage of your hardware and give proper  suggestions for both hardware and software configurations to reduce power consumption of your system. So Now Your Ubuntu is energy Efficient.It is very useful for Laptop Users.

How To Install PowerTop in Ubuntu

Open a terminal and type the following

$ sudo apt-get install powertop

Or You can use Synaptic Package manager and select package powertop.

Tuesday, January 19, 2010

How to Remember Running Applications in Ubuntu 9.10 (Karmic Koala)

In Ubuntu You can start from wherever you left off. Yes, you can make Ubuntu remember the applications you had open when you last logged out, so that when you log back in again you can find all those applications running and you can resume right from where you left off.
To achieve this facility go to System -> Preferences -> Startup Applications, then go to the options tab and check "Automatically remember running applications when logging out"

Sunday, January 17, 2010

Graphical Monitor for the Power Consumption of a Laptop in Ubuntu 9.10 Karmic Koala

Press Alt+F2, then open a run window, then type gnome-power-statistics, Now you can see a graph which shows the usage of power over the time since it booted up (it depends on ur hardware support).

How to Recover Lost Skype Password from Ubuntu

Lost my Skype password. How can I retrieve it?

If you have forgotten your Skype password, No Problem, you can request for a new password Click Here. and enter your email address,  new password token sent to the email address you used to originally register with Skype.
Now you will receive an email containing a link to skypes's secure website and a token to change your password. The token will be valid for 6 hours from the time of generation. If you do not use it within this timeframe, you will have to request another one.

If  Your registered is also forgotten ?

Now  you will need to contact skype  customer support with the following details. They will attempt to verify your account and make the appropriate changes.
They  need:
- Your billing address.
- The date of your last purchase of a Skype product.
- And the last two phone numbers called using your Skype Credit.

Saturday, January 16, 2010

How to Access / Install Device Manager in Ubuntu 9.10 Karmic koala

         There is not an  application like Windows Device Manager Ubuntu. Gnome-Device-Manager is the Ubuntu equivalent for the Windows Device Manager application. it's not installed by default. Gnome Device Manager is a front-end, or GUI, to the HAL daemon service. HAL continuously polls the system message flow or "desktop bus," which is also known as "D-Bus.", D-Bus listen for messages about hardware events from the Linux kernel. Example , that a pendrive has been inserted.

How to Install Device Manager in Ubuntu

Open a Terminal andt type

$sudo apt-get install gnome-device-manager

or use synaptic package manager

Using Device Manager in Ubuntu

Gnome Device Manager is started by selecting
Applications → System Tools → Device Manager.

Thursday, January 14, 2010

Compare GET and POST Methods of HTML Form

Compare GET and POST Methods of HTML Form
  • The main difference between GET and POST is how the form data is passing. 
  • Both are used for passing form field values.
  • All the values which is submitted by the GET method will be appended to the URL.
    Where as POST method send the data with out appending the URL(hidden)
  • In GET Method we can bookmark the URLs where as in POST method its not possible.
  • In GET Method there is a limit for passing the data from one page to another(ie 256 characters according to w3c standards)
    But in POST we can send large amount of data
  • Compared to POST get is Faster
  • POST is more secure than get method
  • If you refresh the page , POST method shows an annoying alert box
  • Some firewalls doesn't allow POST methods.
  • All the informations which is passed by GET method will be stored in webserver (log file) but in POST we can not
Source :

Tuesday, January 12, 2010

How to Install GNOME 3 (GNOME-Shell) in ubuntu 9.10Karmic Koala

GNOME (GNU Network Object Model Environment) is a desktop environment created for the operating system GNU / Linux Desktop Environment is recognized as the official GNU project. With the announcement of version 3.0 was introduced GNOME-Shell, which integrates various functions into a 'single window.  The desktop area is divided into several parts depending on the activities and workspaces is dynamic: you can add or remove workspaces and you can move any applications in different areas of work, as already happens with Compiz.
Now you can see How  to install GNOME on Ubuntu 9.10-Shell Karmic Koala.

     First  you have to install all the dependencies needed to successfully build and run gnome-shell.

     $ sudo apt-get build-dep gnome-shell

   After installing all the packages necessary steps for installing veritable gnome-shell

     $ sudo apt-get install gnome-shell

 Once installed, you can start GNOME-Shell by typing the following command in a terminal:

     $ gnome-shell --replace

GNOME-Shell is still under development and therefore very unstable.
Try it in your Test machine or in a Virtual machine.

Typical Regulated Power supply Circuit for Microcontrollers

If you are applying a DC unregulated power supply to Microcontroller projects , you need to regulate it using a fixed regulator. Lot of my friends are asking which capacitor we need to use in input side and output side. Here you can see a typical voltage regulator circuit, you can use in microcontroller cuircuits.

Monday, January 11, 2010

Crack your Wi-Fi WEP and WPA-PSK keys with Aircrack in Ubuntu

Aircrack-ng is an 802.11a/b/g WEP/WPA cracking program that can recover a 40-bit, 104-bit, 256-bit or 512-bit WEP key once enough encrypted packets havebeen gathered. Also it can attack WPA1/2 networks with some advanced methods or simply by brute force.

Howto Install Aircrack-ng in ubuntu

open a terminal and type
$sudo apt-get install aircrack-ng  

or use Synaptic package manager

Tuesday, January 5, 2010

Solve VirtualBox can't operate in VMX root mode VirtualBox Error in Ubuntu

VirtualBox Shows "VirtualBox can't operate in VMX root mode" VERR_VMX_IN_VMX_ROOT_MODE error message

How to solve the problem

Open a Terminal and Type the following

$sudo modprobe -r kvm_intel

and restart the Virtual Machine

How to Install Firefix 3.6 (Namoraka) in Ubuntu 9.10 (Karmic Koala )

The Latest Version of Firefox is now available in launchpad. For Installing Firefox 3.6 in your machine, do the following steps
First  Add the ppa to ubuntu repository,   Then Add the GPG Key, update and install

Open a terminal and type the following

$ sudo sh -c "echo 'deb karmic main' /etc/apt/sources.list"

$ sudo apt-key adv --keyserver --recv-keys 247510BE

$sudo apt-get update

$sudo apt-get install firefox-3.6

Now You can Start  firefox 3.6
Go to Applications --> Internet--> Namoroka Web Browser

Monday, January 4, 2010

How to Install Virtual Box 3.1 in Ubuntu 9.10 karmic Koala

VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. It is  freely available as Open Source Software under the terms of the GNU General Public License (GPL). VirtualBox runs on Windows, Linux, Macintosh and OpenSolaris hosts and supports a large number of guest operating systems. You can test your Alpha and Beta releases. It supports USB and Serial Ports.

VirtualBox-ose is available in Ubuntu repository by default but it will not support USB

How to Install VirtualBox  is Ubuntu

First You Have to add the following repository

deb karmic non-free

For This, you have to add the above line to /etc/apt/sources.list

$sudo gedit /etc/apt/sources.list


Open Synaptic Package Manager --> Settings --> Repositories --> Other Software --> Add

Now Type the following Line in a Command line

$ wget -q -O- | sudo apt-key add -

$ sudo apt-get update

$ sudo aptitude install virtualbox-3.1 dkms

After asking some normal questions

( Creating group vboxusers  press OK  then Kernel Module installation press Yes )

Now VirtualBox is available at menu

Applications > System Tools > Sun VirtualBox  

Sunday, January 3, 2010

How to Enable Third Party Repositories for Install MP3/DVD/MPEG ( Multimedia Files ) in Fedora 12

For Intalling Non-Free  applications Like MP3, DVD, MPEG, Binary Drivers, etc, in Fedora 12 You have to inatall  a third party repository. The recommended repository for Fedora is: RPMFusion.

How To set up the RPMFusion repositories in Fedora: 

Open a terminal and Type the following

$sudo rpm -ivh

$ sudo rpm -ivh

After adding this repositories you can Install Multimedia Applications

How to Setup Yum and Yum Plugins in Fedora 12

Like apt in Debian /Ubuntu , Fedora uses yum to install and update its softwares from Internet. When connected to the internet it will automatically determine application dependencies.
Fedora typically has 2 repositories enabled by default: fedora and updates

While lot of plugins are available for  yum . Fedora 12 and newer enable yum-presto which should try to download only updated portions of packages instead of the full package during updates. Some experianced  users use the fastestmirror plugin which find faster sources for speeds up downloads.

How to install fastestmirror plugin in fedora 12

then type 

$ sudo yum install yum-plugin-fastestmirror

How to save Photos and Video from Webcam in Ubuntu / Debian Linux : Cheese

Cheese is a very good Utility  for the GNOME Desktop which used for  take photos, videos, and anything else you can think of with your webcam.
Just start it up and shoot! Gather all of your friends around, have some fun! Cheese uses GStreamer to apply fancy effects to photos and videos. It also allows you to take videos. Effects, sharing.

How to install in Ubuntu

open a terminal

$sudo apt-get install cheese  ( or use synaptic package Manager)

Deb Package is available here

Saturday, January 2, 2010

Wallpapers from Social Wallpapering

Wallpapers from Social  Wallpapering

You cab download and vote for beautiful wallpapers