Question: I would like to understand the basics of how to write, compile and execute a Java program on UNIX / Linux OS. Can you explain it with a simple example?

Answer: In this article, let us review very quickly how to write a basic Hello World Java program and how to compile *.java program on Linux or Unix OS.

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If you are using Gmail, you might have already noticed the ‘Buzz’ link right below your inbox. Google buzz looks like a combination of twitter and facebook features built right in your email application.

What do you think about Google Buzz? Do you like it?
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Photo Courtesy: Kol Tregaskes

In the first article of this series we saw how awk could be put to work (or play) for more than just processing text. The simple script demonstrated the use of associative arrays, recursion and how we could use more arrays (more than required to represent the data) to speed up the processing. There were some teaser ideas left at the end if you were looking for something faster.
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Thanks for visiting this article from the Nagios newsletter. We’ll be posting several Nagios XI tutorials in the upcoming weeks.

Nagios Price:

• Nagios Core is free and open source.
• Nagios XI is $1,295 (to monitor unlimited number of hosts). This is perpetual license — Once you’ve purchased the software, use it as long as you want without any additional license fees.

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Question: How do I change the desktop background wallpaper in fluxbox window manager?

Answer: We discussed fluxbox earlier in an introduction to the fluxbox window manager and how to shutdown the system from fluxbox window manager.

In this article we’ll see how to change the wallpaper in fluxbox by using a bash script or by editing the menu file.
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This article is part of the on-going Awk Tutorial Examples series. In our earlier awk articles, we discussed about awk print, awk user-defined variables, and awk built-in variables.

Like any other programming language Awk also has lot of operators for number and string operations. In this article let us discuss about all the key awk operators.
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I personally prefer to use less command to view files (instead of opening the file to view in an editor). Less is similar to more command, but less allows both forward and backward movements. Moreover, less don’t require to load the whole file before viewing. Try opening a large log file in Vim editor and less — you’ll see the speed difference.

The navigation keys in less command are similar to Vim editor. In this article, let us look at few less command navigation and other operations which will make you a better command line warrior.
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