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Chmod Calculator – Set file permission with chmod

Chmod Calculator – Set file permission with chmod
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For most of us, working in Linux or in a shell is not necessarily a daily activity, and that’s totally OK.
I’m not daily working with it either, but occasionally I use one of those funny commands to set the access rights to certain files and/or directories.

This command, chmod, is not super complicated to work with, and is commonly used when working in a shell or terminal on both the MacOS X and Linux platforms. But we need a “magci number” to set these rights. The “magic number” for chmod is also commonly used with FTP programs.

Whenever I use this command, I need to refresh my mind on how to calculate the “magic number”, and I find myself looking for a chmod calculator.
Since I’m lazy at times, I figured: why not have one on my own website?

So I started playing with JavaScript and created this chmod calculator.

Bitcoin Introduction for Beginners

Bitcoin Introduction for Beginners
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Most of us have heard the phrase “Bitcoin“, as it appeared in numerous news articles and tech blogs. I’m also pretty sure that most of us know that “Bitcoins” is seen as some sorts of “online currency”.

Trying to figure out how it all works on the other hand is a totally different story, as I’ve found out myself when I was trying to get started. Most articles out there are very technical, and often very confusing.

That’s why I wrote this article, a Bitcoins Introduction, to tell you more about what bitcoins are, how to use them …

What is RAID and How RAID works …

What is RAID and How RAID works …
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The need for more and more reliable data storage space keeps increasing as we move forward in time. Our picture files get bigger, we scan our documents and we collect more videos than ever before.

For more storage we used to simply buy more hard-drives, internal or external. But eventually we have a wide collection of individual drivers each with their own mount point (drive letter under Windows). This is where RAID can help and combine these individual drives to one big drive. More and more computers are RAID capable.

RAID allows us to combine drives, increase speed and improve reliability so we can store more data while our data is stored safer. But it’s not all that straight forward, so in this article a description of what RAID is, what kinds of RAID you might run into and how RAID works …

How to put your signature on PDF documents …

How to put your signature on PDF documents …
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In this article I will demonstrate how to put your signature on computer documents (PDF) without the need to print the document first, sign it with a pen, and scan it back to a PDF file.

Most modern PDF readers actually allow you to add a digitized image of your signature and common PDF readers even assist you with the scanning, either through a scanner or webcam.

For this purpose we will use Apple’s Preview (MacOS X), Adobe Acrobat Reader (MacOS X, Windows) or Xournal (Linux). All these applications are of course available for free.

DVD Region codes and Blu-Ray Region codes

DVD Region codes and Blu-Ray Region codes
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DVD and Blu-Ray Region codes ….

I’m not sure if you have ran into this problem at some point in time, with DVD or Blu-Ray discs, but I have:
You buy a movie online, say from Amazon.com in the US (Region 1), and you’re living in say The Netherlands (Region 2 – but there is no Amazon to be found here). You get a good deal, but shipping costs kind-a even it out in the end, but who cares; you’ve got that specific movie you’re looking for and you did everything legit.

At least that’s what you think … in this article: The DVD and Blu-Ray Region Codes horror and a very few details on other “copy protection” stuff.

Some Audio basics explained …

Some Audio basics explained …
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We take music and movie soundtracks for granted … it’s there and we never really worry how or why it all works.

Like with all things in life – when you understand the basic workings of something, you’ll be much better at trouble shooting issues, which goes for Audio as well so in this article I’ll show you (simplified) how audio works, how your computer handles it, and how you can hear the music produced by your computer or other device through a speaker or headphone.

CD Media: How a CD works, Media types, Labeling, etc.

CD Media: How a CD works, Media types, Labeling, etc.
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CD’s are probably not as popular anymore as they used to be, everybody has an MP3 player or device capable of playing MP3’s and a DVD disc, BluRay disc, or a USB stick holds a lot more data,… so why bother?

There are however still plenty of people out there that actually use CD’s. At home or in their car with their audio system, or to quickly burn a few files on a disk for a friend.

In this article: How do CD’s work, what kind of media should I use, how do label CD’s, etc.