5 Deadly Terminal Commands in Linux

Terminal is powerful than Command Prompt. It won't ask your confirmation if you type a deadly command. Newbie linux users can be easily fooled by these code spreading as trolls via internet. So you must be aware of these code that will destory you computer.

1.  rm-rf / 
this code deletes everything on your computer. This formats everything possible including Hard drives and connected storage devices.
rm - deletes the following files.
-rf - deletes all the files and folders inside a particular folder.
/ - this instructs rm to start from the root where all your files are located.

2. :(){ :|: & };:
this one is a kind of virus that defines a shell function. It has the ability to replicate itself to many copies which may then eats up your cpu time and memory.

3. mkfs.ext4 /dev/sda1
this one is same as formatting C drive in windows. this will format your first partition and replace them with a new file system.

4. mv ~ /dev/null
This code makes your home folder disappear. in other words will move your home folder into a black hole. 
mv - means to move folder or file.
~ - this indicates your home folder as a whole.
/dev/null - Destroys everything.

5. dd if=/dev/random of=/dev/sda 
This code copies junk files in to hard drive.
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5 Common Android Problems and Solutions

1. Problems in Connectivity
Android phone sometimes misbehaves while connecting to Wi-Fi, Bluetooth etc. while facing such problems, Turn on airplane mode for 30 secs and Turn it off now try to connect again. Or Restart your phone.

2. Crashed Apps
Apps can crash anytime for some reasons. If you have such a problem, Touch and hold Home button(for most phones) to enter the Multitask menu. Force close the app by swiping it, Then reopen it.

3. Syncing error
first of all, Check your network connection. Check that the App that you want to sync isn't down. Ensure that the password you've entered is correct. If you're still having problem, Remove that accout you want to sync then add it again.

4. Text Messages Stalled
Connect your device to internet through either Cellular or Wi-Fi. Resend it again. If prob continues, Restart your device or consider installing 3rd party messaging apps.

5. Hanged Screen
It's a common problem in android device that it sometimes becomes irresponsive and you might want to Destroy it. But Doing such physical damages may make things worse.Try to restart your device or remove your battery then install battery again. Now turn on your phone.
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How to hide folder with password in Windows

It's easy to hide folder in linux, by just adding a dot infront of the name of a folder, but in Windows, you'll have to create one batch file for this. I'll tell you how,

Copy and paste this in Notepad,

title Folder Private 
if EXIST "HTG Locker" goto UNLOCK 
if NOT EXIST Private goto MDLOCKER 
echo Are you sure you 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. 
ren Private "HTG Locker" 
attrib +h +s "HTG Locker" 
echo Folder locked 
goto End 
echo enter the key 
set/p "pass=>" 
if NOT %pass%== PASSHERE goto FAIL 
attrib -h -s "HTG Locker" 
ren "HTG Locker" Private 
echo Folder Unlocked successfully 
goto End 
echo Invalid password 
goto end 
md Private 
echo Private created successfully 
goto End 
The Black colored letter Indicates the Password, change it to your desired password. Then Save this as key.bat, whatever the name be, but .bat extension is necessary. Save this wherever you want. opening this file will create a new folder in the folder you've saved the .bat file named Private. Copy and paste whatever you want to hide, to this folder. Again, Open this batch file and it will ask you 'Are you sure you want to lock the folder(Y/N)' then type y and press enter. This will hide the folder. to unhide the folder, open Batch file again and it will ask for your Password, type your password and Press enter. 
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How to permanently delete files

In the last post, I've told you on recovering Permanently deleted files, Now I'm gonna show you how to Permanently delete file that 'Recuva' Cannot Recover. For this, you have to download a Software called Eraser. You can download it here.

Step 1: Open Eraser software.
Step 2: Press CTRL+N to create a new task.
Step 3: If you want, give a task name, select the task type, which means to run the task now or later or at a specific time.

Step 4: click on Add data button give erasure method(leave it if not known.) Add the path of the file or whole files in a folder or a drive or recycle bin, that you want to delete. and click on Ok button.

Step 5: if you've clicked on Run Immediately it'll be done as soon as you click on ok button, if you've clicked Run Manually, Right click that task and select Run now button.
Enjoy deleting without traces...
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How to recover permanently deleted files in Windows

In this post, I'm gonna show you how to recover deleted files from recycle bin. Its by using a software called Recuva. You can download Recuva from here. After downloading, Install it.
Recuva Can recover most deleted files that exists in your computer in the form of dead files. Windows have no access to these dead files.

Step 1: Open Recuva.

Step 2: Give the file format of the deleted file, give the option 'All files', if you don't know the format.

Step 3: Click next and give the location of the deleted file. select, I'm not sure if you don't know the location.

Step 4: Now click next. and click on start button.

Step 5: after you get the recovered files, Select the file you want to recover and click on recover button.

Now enjoy the power of fearless deleting...

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Go Back Function using JavaScript

"Go Back" function using Javascript. In this post, you'll see how to add a "Go Back" button to a webpage.

The code for the button:

<input type="button" value="Go Back one page" onclick="history.back(-1)" />
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Making Text Blurry in CSS.

In this post, you'll see how to make any text blurry using CSS. its simple.

.blur {
   color: transparent;
   text-shadow: 0 0 5px rgba(0,0,0,0.5);
The CSS selector 'text-shadow' is compatible with more browsers. after making its color transparent, and having a shadow makes it appear as blurry.
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