The Geek Stuff

Nagios XI Review (Free Nagios core Vs Nagios XI)

Ramesh Natarajan — Mon, 08 Feb 2010 06:02:25 +0000

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. Nagios Support: The free Nagios Core is very easy to install, configure and maintain. If you have in-house [...]

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How To Change Wallpaper in Fluxbox Window Manager

Leonardo Sanchez — Fri, 05 Feb 2010 06:01:00 +0000

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 [...]

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7 Powerful Awk Operators Examples (Unary, Binary, Arithmetic, String, Assignment, Conditional, Reg-Ex Awk Operators)

Sasikala — Wed, 03 Feb 2010 06:02:46 +0000

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. There [...]

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Unix Less Command: 10 Tips for Effective Navigation

Ramesh Natarajan — Mon, 01 Feb 2010 06:03:22 +0000

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 [...]

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2 Books Giveaway Winners: Linux Firewall and Learning jQuery 1.3

Ramesh Natarajan — Fri, 29 Jan 2010 07:08:40 +0000

I’m happy to announce winners of the 2 books giveaway contest. Following are randomly selected winners, who will receive the corresponding PDF version of the book. Linux Firewall Book Winner: Frank Q (comment #93) Learning jQuery 1.3 Book Winner: Sigurdur Jonsson (comment #133) Since there were 154 awesome comments, I generated two random numbers between 1 and 154 using [...]

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8 Powerful Awk Built-in Variables – FS, OFS, RS, ORS, NR, NF, FILENAME, FNR

Sasikala — Wed, 27 Jan 2010 06:02:36 +0000

This article is part of the on-going Awk Tutorial Examples series. Awk has several powerful built-in variables. There are two types of built-in variables in Awk. Variable which defines values which can be changed such as field separator and record separator. Variable which can be used for processing and reports such as Number of records, number of [...]

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Gone in 60 Seconds – Find Disappeared Internet Pages

Ramesh Natarajan — Mon, 25 Jan 2010 06:01:04 +0000

While internet is not as smart as Angelina Jolie to make a website or a webpage disappear in 60 seconds, it still somehow manages to make some of the webpages disappear after a while. When you come across something interesting over the internet, you may either bookmark it locally or in a social bookmarking site for [...]

Shell Script Execution Guidelines for Newbies

Ramesh Natarajan — Fri, 22 Jan 2010 06:01:50 +0000

Question: What are the basic fundamental things I should know to execute a shell script? Also, when I execute my shell script I get “Permission denied” error message. How do I fix it? Answer: Let us review the 4 basic fundamental things you should know about executing a shell script. 1. Locate the shell executable and give [...]

How To Add Shutdown / Reboot Functionality to Fluxbox Window Manager for X

Leonardo Sanchez — Fri, 22 Jan 2010 06:01:42 +0000

Question: How do I add shutdown / Reboot functionality to the fluxbox window manager? Can you explain to me with clear examples? Answer: In our previous article we gave an introduction to the fluxbox. In this article, let us review how to add shutdown or reboot functionality to fluxbox. Adding Shutdown / Reboot Functionality to Fluxbox You don’t [...]

Awk Tutorial: Understand Awk Variables with 3 Practical Examples

Sasikala — Wed, 20 Jan 2010 06:02:51 +0000

This article is part of the on-going Awk Tutorial and Examples series. Like any other programming languages, Awk also has user defined variables and built-in variables. In this article let us review how to define and use awk variables. Awk variables should begin with the letter, followed by it can consist of alpha numeric characters or underscore. Keywords [...]