Monday, October 12, 2009

Ip address to Hostname & Hostname to Ip address





To find the Ip address of a host/Site [Name to IP]

Goto -- > cmd --> nslookup--> www.google.com,




or

Simpy goto --> Run -->cmd --> ping systemname [This gives the IP address]









To find the Hostname of a Computer/Server [IP to Name]

Goto --> cmd --> tracert ipaddress





or

Simpy goto --> Run -->cmd --> ping -a IP Adress [This gives the hostname]




Thursday, October 8, 2009

Network cables


Hi all,
             In network cable there are different types of Categories, Ex: CAT5, CAT6 etc., but whatever Category we use the cables are crimped into two types.
                                                                                1.Straight cable               2.Cross cable






















Note :

* From the above you understand that Straight cable has same crimping[color codes] on both the ends and the Cross cable has different crimping[color codes] on the ends.


* The straight cable is used to connect to different type of devices as Hub to PC, Switch to PC, So here the Transmission and Receiving ends should be same, so we are using same color code on both sides.

* Cross cable is used to connect to same type of devices as Hub to Hub, Switch to Switch, So here the transmission wires on one end should be connected to the receiving end on the other side, so we are using different color code on both sides.


Wednesday, October 7, 2009

How to hide files in JPEG pictures



Using a simple trick in Windows, you can actually hide a file inside of the JPG picture file!

You can hide any type of file inside of an image file, including txt, exe, mp3, avi, or whatever else. Not only that, you can actually store many files inside of single JPG file, not just one!
Hide File in Picture

* Create a folder on your hard drive, i.e. C:\Test and put in all of the files that you want to hide into that folder. Also, place the image that you will be using to hide the files in.

hide file in jpg

* Now select all of the files that you want to hide, right-click on them, and choose the option to add them to a compressed ZIP or RAR file. Only select the files you want to hide, not the picture. Name it whatever you want, i,e. “Hidden.rar”.

add to archive

* Now you should have a folder that looks something like this with files, a JPG image, and a compressed archive:

hidden.rar

* Now here’s the fun part! Click on Start, and then click on Run. Type in “CMD” without the quotes and press Enter. You should now see the command prompt window open. Type in “CD \” to get to the root directory. Then type CD and the directory name that you created, i.e. “CD Test“.

cd test

* Now type in the following line: “copy /b DSC06578.JPG + Hidden.rar DSC06578.jpg” and press Enter. Do not use the quotes. You should get a response like below:

hide files in jpg

Just make sure that you check the file extension on the compressed file, whether it is .ZIP or .RAR as you have to type out the entire file name with extension in the command. I have heard that some people say that they have had problems doing this with a .ZIP extension, so if that doesn’t work, make sure to compress to a .RAR file.

And that’s it! The picture file will have been updated with the compressed archive inside! You can actually check the file size of the picture and see that it has increased by the same amount as the size of the archive.

You can access your hidden file in two ways. Firstly, simply change the extension to .RAR and open the file using WinRAR. Secondly, you can just right-click on the JPG image and choose Open With and then scroll down to WinRAR. Either way, you’ll see your hidden files show up that you can then extract out.

Winrar

That’s it! That is all it takes to hide files inside JPG picture files! It’s a great way simply because not many people know it’s possible and no one even thinks about a picture as having to the ability to “hide” files. Enjoy!
Another way to do the Same

Select all file and right click send to compressed folder and change the extension from .zip to .dll that's all


Because by compiling rar file with jpeg image some time it may cause data loss sometimes


Now type in the following line: “copy /b DSC06578.jpg + Hidden.dll DSC06578.jpg” and press Enter. Do not use the quotes. 

Windows Shortcut Run Commands


Hi friends,


I have seen many system administrator use to work fast while using their desktops and used to admire it. They never use mouse or surf through the start menu for reaching the particular application. So this article gives you the idea about the shortcuts for the run commands.

Working of Run Commands:

Each and every application will be having a executable file for its application and the respective core content will be stored in some executable path. Initially PATH variable will be set in the environmental variable settings tab.
(in my PC, it may have more values also in your PC)
$PATH = C:\Program Files\Support Tools\;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\system32\WBEM;
C:\WINNT\Microsoft.NET\Framework\v2.0.50727;C:\sbin\svn\bin;C:\Program Files
\QuickTime\QTSystem\

Creating Shortcuts:

Creating shortcuts of your wish for particular application and for folders or files is also possible. Let me give a quick example suppose you want to create a shortcut for particular folder in some path.

1. Create folder say c:\shortcuts
2. Open Environmental settings tab of your computer and add "c:\shortcuts" to $PATH.
3. Right Click the folder you want to make shortcuts and create shortcut.
4. Rename the shortcut if you wish.
5. Paste the shortcut into "c:\shortcuts"




To test Open --> Run --> "shortcut name" . It will open the folder for which we have created the shortcut before.

Note : 
* Shortcut name is the name of the shortcut we have placed in the folder "c:\shortcuts"
* We can paste any number of shortcuts in to the "c:\shortcuts" folder and can run it by giving it's name.

Some Windows Run Commands:

  1. Accessibility Controls - access.cpl
  2. Add Hardware Wizard - hdwwiz.cpl
  3. Add/Remove Programs - appwiz.cpl
  4. Administrative Tools - control admintools
  5. Automatic Updates - wuaucpl.cpl
  6. Bluetooth Transfer Wizard - fsquirt
  7. Calculator - calc
  8. Certificate Manager - certmgr.msc
  9. Character Map - charmap
  10. Check Disk Utility - chkdsk
  11. Clipboard Viewer - clipbrd
  12. Command Prompt - cmd
  13. Component Services - dcomcnfg
  14. Computer Management - compmgmt.msc
  15. timedate.cpl - ddeshare
  16. Device Manager - devmgmt.msc
  17. Direct X Control Panel (If Installed)* - directx.cpl
  18. Direct X Troubleshooter - dxdiag
  19. Disk Cleanup Utility - cleanmgr
  20. Disk Defragment - dfrg.msc
  21. Disk Management - diskmgmt.msc
  22. Disk Partition Manager - diskpart
  23. Display Properties - control desktop
  24. Display Properties - desk.cpl
  25. Display Properties (w/Appearance Tab Preselected) - control color
  26. Dr. Watson System Troubleshooting Utility - drwtsn32
  27. Driver Verifier Utility - verifier
  28. Event Viewer - eventvwr.msc
  29. File Signature Verification Tool - sigverif
  30. Findfast - findfast.cpl
  31. Folders Properties - control folders
  32. Fonts - control fonts
  33. Fonts Folder - fonts
  34. Free Cell Card Game - freecell
  35. Game Controllers - joy.cpl
  36. Group Policy Editor (XP Prof) - gpedit.msc
  37. Hearts Card Game - mshearts
  38. Iexpress Wizard - iexpress
  39. Indexing Service - ciadv.msc
  40. Internet Properties - inetcpl.cpl
  41. IP Configuration (Display Connection Configuration) - ipconfig /all
  42. IP Configuration (Display DNS Cache Contents) - ipconfig /displaydns
  43. IP Configuration (Delete DNS Cache Contents) - ipconfig /flushdns
  44. IP Configuration (Release All Connections) - ipconfig /release
  45. IP Configuration (Renew All Connections) - ipconfig /renew
  46. IP Configuration (Refreshes DHCP & Re-Registers DNS) - ipconfig /registerdns
  47. IP Configuration (Display DHCP Class ID) - ipconfig /showclassid
  48. IP Configuration (Modifies DHCP Class ID) - ipconfig /setclassid
  49. Java Control Panel (If Installed) - jpicpl32.cpl
  50. Java Control Panel (If Installed) - javaws
  51. Keyboard Properties - control keyboard
  52. Local Security Settings - secpol.msc
  53. Local Users and Groups - lusrmgr.msc
  54. Logs You Out Of Windows - logoff
  55. Microsoft Chat - winchat
  56. Minesweeper Game - winmine
  57. Mouse Properties - control mouse
  58. Mouse Properties - main.cpl
  59. Network Connections - control netconnections
  60. Network Connections - ncpa.cpl
  61. Network Setup Wizard - netsetup.cpl
  62. Notepad - notepad
  63. Nview Desktop Manager (If Installed) - nvtuicpl.cpl
  64. Object Packager - packager
  65. ODBC Data Source Administrator - odbccp32.cpl
  66. On Screen Keyboard - osk
  67. Opens AC3 Filter (If Installed) - ac3filter.cpl
  68. Password Properties - password.cpl
  69. Performance Monitor - perfmon.msc
  70. Performance Monitor - perfmon
  71. Phone and Modem Options - telephon.cpl
  72. Power Configuration - powercfg.cpl
  73. Printers and Faxes - control printers
  74. Printers Folder - printers
  75. Private Character Editor - eudcedit
  76. Quicktime (If Installed) - QuickTime.cpl
  77. Regional Settings - intl.cpl
  78. Registry Editor - regedit
  79. Registry Editor - regedit32
  80. Remote Desktop - mstsc
  81. Removable Storage - ntmsmgr.msc
  82. Removable Storage Operator Requests - ntmsoprq.msc
  83. Resultant Set of Policy (XP Prof) - rsop.msc
  84. Scanners and Cameras - sticpl.cpl
  85. Scheduled Tasks - control schedtasks
  86. Security Center - wscui.cpl
  87. Services - services.msc
  88. Shared Folders - fsmgmt.msc
  89. Shuts Down Windows - shutdown
  90. Sounds and Audio - mmsys.cpl
  91. Spider Solitare Card Game - spider
  92. SQL Client Configuration - cliconfg
  93. System Configuration Editor - sysedit
  94. System Configuration Utility - msconfig
  95. System File Checker Utility (Scan Immediately) - sfc /scannow
  96. System File Checker Utility (Scan Once At Next Boot) - sfc /scanonce
  97. System File Checker Utility (Scan On Every Boot) - sfc /scanboot
  98. System File Checker Utility (Return to Default Setting) - sfc /revert
  99. System File Checker Utility (Purge File Cache) - sfc /purgecache
  100. System File Checker Utility (Set Cache Size to size x) - sfc /cachesize=x
  101. System Properties - sysdm.cpl
  102. Task Manager - taskmgr
  103. Telnet Client - telnet
  104. User Account Management - nusrmgr.cpl
  105. Utility Manager - utilman
  106. Windows Firewall - firewall.cpl
  107. Windows Magnifier - magnify
  108. Windows Management Infrastructure - wmimgmt.msc
  109. Windows System Security Tool - syskey
  110. Windows Update Launches - wupdmgr
  111. Windows XP Tour Wizard - tourstart
  112. Wordpad - write
  113. Microsoft Outlook - Outlook
  114. Microsoft Word - Winword
  115. Acrobat Reader - Acrord32
  116. Active Dir Users and Comp - Dsa.msc
  117. Routing and remote access - Rrasmgmt.msc
  118. DNS - Dnsmgmt.msc
  119. Add/remove Programs - Appwiz.cpl
  120. Display property - Desk.cpl
Note : 

* Whatever mentioned above *.cpl and *.msc are the files that are available in "C:\Windows\System32"
* U can also find some other shortcuts by going to "C:\Windows\System32" and select search option and type *.msc, *.cpl
* Other shortcuts like winword, excel ..etc are created by the application when it is installed


Saturday, October 3, 2009

Companies & Logos

Do take time out and read this. It's amazing how these famous companies were christened!!!


Adobe


The name came from the river Adobe Creek that ran behind the house of founder John Warnock.


Apache
It got its name because its founders got started by applying patches to code written for NCSA's httpd daemon. The result was 'A PAtCHy' server - thus, the name Apache.


Apple Computers
Favourite fruit of founder Steve Jobs. He was three months late in filing a name for the business, and he threatened to call his company Apple Computers if the other colleagues didn't suggest a better name by 5 o'clock.


Cisco

The name is not an acronym but an abbreviation of San Francisco . The company's logo reflects its San Francisco name heritage. It represents a stylized Golden Gate Bridge.


Google

The name started as a jockey boast about the amount of information the search-engine would be able to search. It was originally named 'Googol', a word for the number represented by 1 followed by 100 zeros. After founders - Stanford graduate students Sergey Brin and Larry Page presented their project to an angel investor, they received a cheque made out to 'Google'.


Hewlett-Packard
Bill Hewlett and Dave Packard tossed a coin to decide whether the company they founded would be called Hewlett-Packard or Packard-Hewlett.


Hotmail

Founder Jack Smith got the idea of accessing email via the web from a computer anywhere in the world. When Sabeer Bhatia came up with the business plan for the mail service, he tried all kinds of names ending in 'mail' and finally settled for Hotmail as it included the letters "html" - the programming language used to write web pages. It was initially referred to as HoTMaiL with selective upper casings.


Intel

Bob Noyce and Gordon Moore wanted to name their new company ' Moore Noyce' but that was already trademarked by a hotel chain, so they had to settle for an acronym of INTegrated Electronics.


Lotus
Mitch Kapor got the name for his company from the lotus position or 'padmasana.' Kapor used to be a teacher of Transcendental Meditation of Maharishi Mahesh Yogi.


Microsoft
It was coined by Bill Gates to represent the company that was devoted to MICROcomputer SOFTware. Originally christened Micro-Soft, the '-' was removed later on.


Motorola

Founder Paul Galvin came up with this name when his company started manufacturing radios for cars. The popular radio company at the time was called Victrola.


Oracle
Larry Ellison and Bob Oats were working on a consulting project for the Central Intelligence Agency (CIA). The code name for the project was called Oracle (the CIA saw this as the system to give answers to all questions or something such).


Red Hat
Company founder Marc Ewing was given the Cornell lacrosse team cap (with red and white stripes) while at college by his grandfather. He lost it and had to search for it desperately. The manual of the beta version of Red Hat Linux had an appeal to readers to return his Red Hat if found by anyone.


SAP

"Systems, Applications, Products in Data Processing", formed by four ex-IBM employees who used to work in the 'Systems/Applications/Projects' group of IBM.


Sony
From the Latin word 'sonus' meaning sound, and 'sonny' a slang used by Americans to refer to a bright youngster.


Sun Microsystems
Founded by four Stanford University buddies, Sun is the acronym for Stanford University Network.

Xerox
The Greek root "xer" means dry. The inventor, Chestor Carlson , named his product Xerox as it was dry copying, markedly different from the then prevailing wet copying.


Yahoo!
The word was invented by Jonathan Swift and used in his book Gulliver's Travels. It represents a person who is repulsive in appearance and action and is barely human. Yahoo! founders Jerry Yang and David Filo selected the name because they considered themselves yahoos.


Thursday, October 1, 2009

Use Ubuntu Live CD to Backup Files from Your Dead Windows Computer

If you’ve ever asked for help with your Windows computer that won’t boot anymore, you’ve probably been told to “Backup all your data and then reinstall”… but if you can’t boot, how can you get to your data?

One of the easiest methods to access your data is to simply boot off an Ubuntu Live CD… and it’s completely free (except for the cost of a blank cd).

Burn an Ubuntu Live CD
If you have another computer, you can download and burn the Ubuntu Live CD using a very simple application called ImgBurn. Otherwise, you can bug one of your friends to help you burn a copy.
Just open up ImgBurn, and click the icon to “Write image file to disc”
image
Then click on the icon next to “Source”, pick the downloaded ISO file, stick a recordable CD into the drive, and click burn.
 image
Now that you have the boot cd (which you should keep in a safe place, as it’s very useful), just stick it in the drive of the computer and boot from it. You should see an option to “Try Ubuntu without any change to your computer”.
image
Once the system has started up, the first thing you want to do is choose Places \ Computer from the menu.
image
This should show you all the drives available in the system, including your Windows drive. In my case, that is the 52.4 GB volume.
image
You can try and double-click on the drive to open it… and if it immediately works then lucky you! Most of the time it’s going to give you an error saying “Unable to mount the volume”, because Windows didn’t shut it down cleanly.
image
Click the Details link so that you can see the full message, and leave this window open. You’ll see a “Choice 2″ in the message, which includes the commands to force Ubuntu to use that drive even though there’s something wrong.
image
What you’ll want to do is open a new Terminal from Applications \  Accessories \ Terminal on the top menu. Once you’ve done that, then you’ll want to type in a bunch of commands, which I’ll walk you through.
First, we’ll want to switch to “administrator” mode, which in Linux terms is known as “root”. The simplest way to do it is with this command:
sudo /bin/bash
Now we’ll need to create a directory that we’ll mount the drive on. The full explanation of mounting drives is a little complex, so just run this command:
mkdir /media/disk
Now comes the tricky part. You’ll need to type out a command very similar to this one, but you’ll need to replace /dev/sda1 with what you see in that message box we showed you above. This command tells Ubuntu to use the ntfs-3g driver, and force mount even if there is a problem.
mount -t ntfs-3g /dev/sda1 /media/disk -o force
If your drive is FAT32 instead of NTFS, then you can use the following command instead:
mount -t vfat -o umask=000 /dev/sda1 /media/disk
image
If you are having problems figuring out whether you have NTFS or FAT32, and you can’t figure out which /dev/whatever to use, then type in the following command at your prompt (make sure you already ran the command to run things as root)
fdisk -l
In the output you should see a lot more information about the available drives… you can see in this example that the filesystem type is NTFS and the device name is /dev/sda1.
image
At this point, you should be able to access your hard drive through the icon in Computer.
image
Note: If you have more than one drive in the computer, or more than one partition, they should show up separately in Computer. You should perform the same steps as above to open those drives up as well.
Backing Up to External USB
The absolute simplest thing to do at this point is to plug in an external USB drive, which should place an icon on the Ubuntu desktop, and most likely immediately pop up a nautilus window showing the contents of the drive.
image
Note: I plugged in a USB Flash drive for illustration… it would be better to plug in a full external USB drive so you’ll have more space for backups.
What Should I Backup?
If you aren’t extremely technical, you might be wondering what on earth you should be backing up… and that’s a very good question.
1) Best Method
If you have loads of empty space on your external drive or network share, you should simply backup the entire contents of the drive, and sort through it later. It’ll take a little longer, but at least that way you can be sure everything has been backed up.
2) Still Good
You should try and backup your entire user folder… on XP you’ll go to “Documents and Settings”, and on Vista you’ll go to “Users”, and you should see your username in the list:
image
You can simply copy this entire folder to your backup drive, which should contain your music, documents, bookmarks, and most of your important files.
Important Note: This will not backup your application files, and you should look around your drive and see if you’ve saved anything important somewhere else. This is especially true if you have more than one drive. Again, your best bet is to simply backup everything.
Backing Up to Network Share
If you would rather backup your drive to a network share on another computer, you can use the Places \ Connect to Server item on the menu.
image
Change the Service type menu to “Windows share”…
image
And then enter in the details for your network drive, with these being the required fields:
  • Server: Computer Name
  • Share: Shared Folder Name
  • User Name: your username
image
Once you click the Connect button, you’ll be prompted to enter in your password. Typically you can leave Domain set to the default, but if you have a custom workgroup name you should enter that instead. I also chose the “Remember password until you logout” button just so I won’t have to enter the password again.
image
Once you click the Connect button you should have an icon on the desktop for your network share.
image
Now you can open up the network share, and if everything is setup correctly on the shared folder side of things, you can copy all of your files across the network using the instructions above on which files to choose.
image
At this point you should have a backup of your data. If you backed up to an external hard drive, you might want to consider also copying those files to another computer just in case, and if you copied across the network you could consider backing that up elsewhere as well.
Now you can proceed with reinstalling or whatever else you’d like to do.

Download Ubuntu Live CD