If you are interested in writing Linux system programming, you should learn all the basic library/system calls. This article has an example C program that covers a set of system calls that will help you understand the usage of these basic library calls.
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Hadoop is an open source software used for distributed computing that can be used to query a large set of data and get the results faster using reliable and scalable architecture.

This is the first article in our new ongoing Hadoop series.
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When your mysql table gets corrupted, use mysqlcheck command to repair it.

Mysqlcheck command checks, repairs, optimizes and analyzes the tables.
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Typically two processes communicate with each other on a single system through one of the following inter process communication techniques.

• Pipes
• Message queues
• Shared memory

There are several other methods. But the above are some of the very classic ways of interprocess communication.

But have you ever given a thought over how two processes communicate across a network?

For example, when you browse a website, on your local system the process running is your web browser, while on the remote system the process running is the web server. So this is also an inter process communication but the technique through which they communicate with each other is SOCKETS, which is the focus of this article.
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If you want to manipulate excel files programmatically, you can use Perl Spreadsheet module, which provides an object interface that makes it easier to create and parse Excel files.
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Crontab command manages the cron table that is used by the cron daemon to execute the cron jobs. This article explains the various command line options of the crontab command.

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