A Basic hand-coded Calculator created using Notepad

A Basic hand-coded Calculator created using Notepad

Posted by Kiran.BL on Thursday, December 21, 2017 in Microsoft, Windows,

Making calculations using Windows calculator can get tedious. 

In this article, I'll tell you how to create your's personal calculator in a few seconds. 

Today let us try building our own command prompt calculator.

The following steps help you in building a simple calculator.

Step 1:

Press Windows logo + R on the keyboard, it will launch the Run window.

Type Notepad and press enter.

Step 2: 

 Copy the following code and paste it into the notepad.

@echo off

title Basic Calculator by Kiran

color 3f

:top

echo --------------------------------------------------------------

echo Welcome to Basic Calculator  

echo --------------------------------------------------------------

echo. 

set /p sum=

set /a ans=%sum%

echo. 

echo = %ans%

echo --------------------------------------------------------------

pause

cls

echo Previous Answer: %ans%

goto top

pause

exit

Note:

1. Use the format (without quotes as in the above code) title xxx in the above code have your own title. 

2. change the background and the font colour of the calculator

considering  2 hex digits — the first corresponds the background; the second the foreground. Each digit will follow the following values:

0 = Black, 1 = Blue, 2 = Green, 3 = Aqua, 4 = Red, 5 = Purple, 6 = Yellow, 7 = White, 8 = Gray, 9 = Light Blue

 A = Light Green, B = Light Aqua, C = Light Red, D = Light Purple, E = Light Yellow, F = Bright White

Ex: In the code, we have used 3f. This means, the background colour will be Aqua and the font colour will be Bright white.

Like the above example, you can have your own colour combinations. The format is colour XX. 

                 -> XX represents the colour combinations.

Step 3: 

Now Save Notepad in  .bat format

Note: 

1. It can only handle integers and those of a specific number of digits. It doesn’t handle complex equations.

2. What is .bat?

.bat is an extension of batch files. A batch file is a text file that contains many commands for a computer’s operating system.

Step 4: 

Double-click on a file you have created. 

A command line based calculator will appear on the screen. 

Step 5:

To calculate, type the number and press enter. You will see the answer.

Step 6:

Press any key to clear the previous calculation. Continue calculating with a different set of numbers. It will then display the answer of the previous calculation at the starting of the screen.

Conclusion: 

Like this, you can create your own calculator and use this in your Day-to-day life.

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How To Lock A Folder Using Notepad

How To Lock A Folder Using Notepad

Posted by Kiran.BL on Wednesday, December 20, 2017 in Microsoft, Windows,

There are many file locker applications available over the internet. We need to pay for some of the applications available. Here in this article, I will explain you about how to lock a file Microsoft way. This procedure is a bit difficult. But, secure than any other file locker software as this method is from Microsoft.

The following steps will guide you on how to lock a folder using notepad.

Step 1:
Press Windows logo + R on your keyboard, it will launch the Run window.
Type Notepad and press enter.

Step 2:

Now Copy the following code and paste it into notepad

cls
@ECHO OFF
title Folder Locker
if EXIST "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" goto UNLOCK
if NOT EXIST Locker goto MDLOCKER
:CONFIRM
echo Are you sure u want to Lock the folder(Y/N)
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.
goto CONFIRM
:LOCK
ren Locker "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
attrib +h +s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
echo Folder locked
goto End
:UNLOCK
echo Enter password to Unlock folder
set/p "pass=>"
if NOT %pass%==type your password here  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
:FAIL
echo Invalid password
goto end
:MDLOCKER
md Locker
echo Locker created successfully
goto End
:End

Make sure that you will replace type your password here with your own password in the code.
Now Save Notepad as FolderLock.bat in the desired location.

Step 3:

Now double click on FolderLock.bat file then a new folder named as Locker is created.

Step 4:

Save your files in Locker folder

Step 5:

Again, double-click on the FolderLock.bat, a Command prompt window pops up.

Step 6:

To lock the folder(Locker) press "y " in the prompt to lock and hide the folder.

If you want to unlock the folder to access that folder; please double click on FolderLock.bat. You will be asked to enter the password.

Please enter the password and press enter.
The Locker folder gets unlocked and you can access the files that you were in need of.

Conclusion:

Using the above steps, you can lock the folder and unlock it using Notepad.


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Add application shortcuts to the Windows Desktop Right-Click Menu

Add application shortcuts to the Windows Desktop Right-Click Menu

Posted by Kiran.BL on Tuesday, December 19, 2017 in Microsoft, Windows,

We use a lot of applications in day to day life. Some of them are most important and we use those applications very often. We pile up shortcuts of often used applications on the desktop and use them. What if we have those applications listed in the desktop right-click menu. Simple registry changes will help you list of the often used applications in the right-click menu. This technique should work in Windows 7, 8, 10, or Vista.

The following are the steps that will help you launch those applications in the easiest possible way.

We’ll show you how to add Notepad to the menu, but you could add any applications you want instead.

Step 1: OPEN REGEDIT

Press Windows logo + R on your keyboard, It will launch the Run window.

Type REGEDIT and press Enter.

You will get a window like in the below picture

STEP 2: Backing up Registry (Important step)

I would recommend you to take a backup of the registry as a precautionary measure.

To take a back up please click on FILE menu and select EXPORT.

You will get a window to called EXPORT REGISTRY FILE, the name of the backup file should be in the format Backup DD.MM.YY.

Select the location where you wish to save and click on SAVE

STEP 3: Navigating to the Shell Folder

Once the backup file is saved, browse down to the following key:

HKEY_CLASSES_ROOT\Directory\Background\shell

STEP 4: Creating an entry under the shell folder

You’ll want to create a new key underneath the shell key, the name of which is exactly what is going to show up on the desktop menu. Right-click on the “shell” key, and then choose New \ Key from the menu.

Give the new key the name that you want to show up on the desktop context menu. For this example, we’ll be using Notepad.

Next, you’ll need to create the command key that will actually hold the command used to launch the application. Right-click on the new Notepad key, and then choose New \ Key from the menu.

Give this key the name “command” in lowercase.

To complete this step you’ll need the full path to the application that you want to launch. You can use Shift + Right-Click to get the Copy as Path menu item to find this more quickly.

Now click on “command” in reg edit that you have created on the left side, and then double-click on the (Default) key on the right side to edit the string value

Paste in the full path to the executable that you got from the “Copy as Path” step above, or you can put in the full path yourself if you’d like.

Once you have clicked OK, it should look like this:

Now that you have set-up, Go to desktop and right-click on the desktop. In the context menu click on a notepad. you will see the application opened.

You can add as many applications to the desktop context menu as you’d like, just repeat the steps again with a new menu item name.

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Installing a packet analyzer application Wireshark

Installing a packet analyzer application Wireshark

Posted by Kiran.BL on Sunday, November 19, 2017 in Linux, Microsoft, Windows,

Wireshark

Wireshark is the world’s foremost and widely-used network protocol analyzer. It lets you see what’s happening on your network at a microscopic level and is the de facto (and often de jure) standard across many commercial and non-profit enterprises, government agencies, and educational institutions.

Features (as listed on the website)

Wireshark has a rich feature set which includes the following:

•     Deep inspection of hundreds of protocols, with more being added all the time
•     Live capture and offline analysis
•     Standard three-pane packet browser
•     Multi-platform: Runs on Windows, Linux, macOS, Solaris, FreeBSD, NetBSD, and many others
•     Captured network data can be browsed via a GUI, or via the TTY-mode TShark utility
•     The most powerful display filters in the industry
•     Rich VoIP analysis
•     Read/write many different capture file formats: tcpdump (libpcap), Pcap NG, Catapult DCT2000, Cisco Secure IDS iplog, Microsoft Network Monitor, Network General Sniffer® (compressed and uncompressed), Sniffer® Pro, and NetXray®, Network Instruments Observer, NetScreen snoop, Novell LANalyzer, RADCOM WAN/LAN Analyzer, Shomiti/Finisar Surveyor, Tektronix K12xx, Visual Networks Visual UpTime, WildPackets EtherPeek/TokenPeek/AiroPeek, and many others
•     Capture files compressed with gzip can be decompressed on the fly
•     Live data can be read from Ethernet, IEEE 802.11, PPP/HDLC, ATM, Bluetooth, USB, Token Ring, Frame Relay, FDDI, and others (depending on your platform)
•     Decryption support for many protocols, including IPsec, ISAKMP, Kerberos, SNMPv3, SSL/TLS, WEP, and WPA/WPA2
•     Coloring rules can be applied to the packet list for quick, intuitive analysis
•     Output can be exported to XML, PostScript®, CSV, or plain text

Installing Wireshark in terminal of different Linux distro's

Ubuntu and its derivatives

sudo add-apt-repository ppa:wireshark-dev/stable

sudo apt update && sudo apt install wireshark

Opensuse

To install Wireshark in openSUSE Leap 42.3

zypper addrepo https://download.opensuse.org/repositories/network:utilities/openSUSE_Leap_42.3/network:utilities.repo
zypper refresh
zypper install wireshark

To install Wireshark in openSUSE Leap 42.2

zypper addrepo https://download.opensuse.org/repositories/network:utilities/openSUSE_Leap_42.2/network:utilities.repo
zypper refresh
zypper install wireshark

Note : please vist https://software.opensuse.org/download.html?project=network%3Autilities&package=wireshark    For more versions

Fedora 

sudo dnf install wireshark-qt
or
sudo dnf install wireshark-gtk

Now you need to use a tool called alternatives to switch among them:

$ sudo alternatives --config wireshark
There are 2 programs which provide 'wireshark'.

Selection Command
-----------------------------------------------
*+ 1 /usr/sbin/wireshark-qt
2 /usr/sbin/wireshark-gtk

Enter to keep the current selection[+], or type selection number: 2

Arch Linux and its derivatives 

sudo pacman -S wireshark-qt
or
sudo pacman -S wireshark-gtk

Redhat 

yum install wireshark wireshark-qt

Download location for Windows and Mac

https://www.wireshark.org/download.html

Visit above link. In that page, click on Stable release and download the application for both 64 bit and 32 bit systems

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Format a non-accessible flash drive

Format a non-accessible flash drive

Posted by Kiran.BL on Sunday, October 01, 2017 in Microsoft, Windows,

                                             

In your daily life, you use your pen drive for a lot of purposes. One such time, when you plug into your PC or laptop for some important work. It will ask you to format the disk or it will say that the drive is not accessible as shown the image below. It will also not show the details of the disk

When you check the properties of the drive, it will show 0 bytes as in the image below

Now go to DISK MANAGEMENT tool of Windows to check what has happened to the drive.

To open the DISK MANAGEMENT tool please follow the below steps:

         1. Press Windows logo + R on your keyboard, It will launch the Run window

                  

                         

           2. Enter diskmgmt.msc  and click OK

When you see in the disk management tool of Windows, It will show that the disk is in the RAW format instead of NTFS or FAT or FAT 32

I will help you with the steps to get your pen drive back in the working condition.

Right-click on the Start button in the lower-left corner of the screen and select the Command Prompt (Admin) option from the Power User menu.

NOTE: You can also press the Windows key + X to access this menu.

 

Please type diskpart and click on Enter

Type list disk and click on Enter

In my case, the Raw file format disk was Disk 2

Type select disk 2 and press Enter

Type Clean and press enter

The status of the Disk 2 in the Disk Management tool will be UNALLOCATED

Right-click on the un-allocated volume and select New Simple Volume

You will get a New Simple Volume Wizard

You will get the full size of the drive, click on Next

Select your desired drive letter and click on Next

Select your desired from the File system drop-down such as FAT32 and NTFS (Preferred FAT 32)

Leave the Allocation unit size as Default

Enter your desired name beside Volume label

Check Perform a quick format option

Click on Next

Click on Finish

The pen drive is back to its full capacity (in my case 8GB)

Conclusion:

Make sure you follow the exact same steps as described above. After performing all the steps, I can assure you that your pen-drive is back to normal ways

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