Hello guys.
Some time back I organized an online treasure hunt as part of an event at my college. I thought of sharing the code with you, as you might find it useful.
So, I uploaded it on github and here is the link to my repository.

Download it from here, and enjoy organizing the game

Sometimes we have to delete files of specific format (common extensions, ends with ~, etc) which were spanned over a group of directories. To do so, we follow certain methods.

Lets do it by an example.
In my case, I've o create the temporary files, i.e., the ones ending with ~.

Method 1: Delete them manually
Method 2: Goto each such directory and run the following command

rm *~

Method 3:

rm *~
rm */*~
rm */*/*~
rm */*/*/*~

First two methods need more time and to use third method, we must know the depth of recursion.

Following method will solve our problem.

Method Friendly: Run the following command from the parent directory from which you are deleting the files.

find . -name '*~' -type f -delete

This will delete all files ending with ~, from the current directory and also all its sub-directories.

Recently I faced a problem with hosting a website on a server to which I have limited access. I was provided with permission only to a sub-directory on the server.
I'm habituated to use relative paths, but my root points to the root of server and not my sub-directory. This forced me to use absolute paths at every point.
I searched for the solution and end up with two results:

.htaccess ot Virtualhost

I never tried to understand .htaccess and I don't have access to set Virtualhost. This forced me to try bit harder and here is the outcome.

I've created a file named rootpath.php on root directory of my website.
(Note: this is not root '/' of the web server, but my sub-directory)
Its contents are as follows:

<?php
    $relative_path = "/subdirectory";
    $server_url = $_SERVER["SERVER_NAME"];

    $root = "http://" . $server_url. $relative_path;
?>

Now, I include this file on top of every file.

Eg: <?php require('rootpath.php'); ?>

and append all paths with <?php print $root; ?>

Eg: <a href="<?php print $root; ?>/index.php">

Note: Initially I used './' and '../' notation, but it won't work always. Consider the following case, which I faced:

/index.php
/header.php
/footer.php
/scripts.php
/contact
--contact/contact.php

I defined a common header for all the pages and stored it in header.php, which in-turn imports all the necessary scripts from scripts.php.
Now, if you import header.php from contact/contact.php, it work work properly because scripts.php is loaded relatively in header.php and now the control searches it in contact directory.

In recent past, I'm need of a tool, to which the provider no longer provides the link to download. Previously I've blogged about Openlogic, which serves this purpose.
Openlogic contains unofficial fork of the original repository, and to be precise, I haven't found the tool I'm in search of. I found Internet Archive : Wayback Machine, while searching for it.

It has got 412 billion stored pages and you may look into older versions of any website or you can get link to any software/tool which used to be a website.
All you have to do is, provide a link or part of a link to search.

For example, to know how my website used to be in 2013, just type

http://www.thechaithanya.com

and you can see a calender with some of the dates highlighted, on which they had the snapshot of my website.

You can even provide a part of link. For example, to get the link of older version of Android ADT, search using

http://dl.google.com/android/adt/*

You can find a set of links and pick your Magic Wand.

After upgrading from Mac OS X Mavericks 10.9.2 to 10.9.3, my machine (HP Probook 4530s) ran into AppleIntelCPUPowerManangement Kernel panic, and to my surprise none of the boot flags helped me to boot into the system.
I decided to do a fresh install, but even booting from USB resulted the same. Then I decided to remove AppleIntelCPUPowerManangement.kext, but I can't even access terminal.

Here's the solution:
My machine dual boots Windows and Mac.

1. I logged into Windows
2. Installed MacDrive, trial version
3. Rebooted into windows and opened the drive on which Mac is installed
4. Did two things, don't know which one helped:

Opened /Extra/org.chameleon.Boot.plist with a text editor and added the following code:

<key>GenerateCStates</key>
<string>No</string>
<key>GeneratePStates</key>
<string>No</string>

And deleted AppleIntelCPUPowerManangement related kexts from this directory:

/System/Library/Extensions/

I found two kext folders related to it and deleted both.

Rebooted without any boot flags and voila. It worked.

Recently I found a very easy and useful tool to access devices (USB, HDD, in-fact drive on which Mac OSX is installed), from windows.

MacDrive:
Once you install MacDrive, it will reboot and all the drives which are Mac-formatted will be mounted alongside the Windows partitions.
Having said that, there is a BIG problem. ITS NOT FREE. But, you can use the trial version, when in need.

In this post we gonna see how to find size of a directory from Terminal. To summarise disk usage of each file, recursively for directories, we can use the following command
du [option]... [FILE/Directory]...
To get the report in human readable format, along with the overall summary, use

du -hs /path/to/directory

To find sizes of directories recursively unto a certain depth (e.g.: depth = 2):

du -h --max-depth=2 /path/to/directory