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RHCE exams, here I come

2014-07-29 21:32:00

Yes, this blog has been quiet for quite a while. In part this is because I've put most of my private stuff behind logins, but also because I've had my professional development on a backburner due to my book translation. 

But now I've started studying for my RHCE certification. A year ago (has it been that long?!) I achieved my RHCSA, which I'll now follow up with the Engineer's degree. Red Hat will still offer the RHEL6 exams until the 19th of december, so I'd better get my ass in gear :)


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F.Lux on Linux: oh happy day!

2014-07-29 21:27:00

Oh happy day! I've been using F.Lux on my Macs for years now and my eyes thank me for it. This great piece of software will automatically adjust the color temperature of your computer's screen, based on your location and light in your surroundings. 

During the day your screen's white will be white, but in the evenings it'll slowly turn much more orange. During this change you won't even notice it's happening, but the end result is awesome. You'll still be seeing "white" but with much less eyestrain. Even better: supposedly the smaller amount of blue light will help in falling asleep later on. 

Now that I've started studying for my RHCE exams, I'm working extensively on CentOS again. Hellooooo bright light! 

But not anymore. Turns out that xflux is a thing! It's a Linux daemon that quite literally is F.Lux, for Linux. No more burnt out corneas! 


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Dutch kendo kata book (Nederlandstalig kendo kata boek)

2014-05-21 14:53:00

Historically, the western kendoka has had a tough time finding books and materials to study in his native language. It is only natural that most texts on the subject of kendo and kendo kata are published in the Japanese language.

The Netherlands and Belgium could be considered a very small market for kendo-related books. Thus, the only kendo books in the dutch language that I am aware of are Louis Vitalis-sensei‘s book and the translation of Jeff Broderick’s book.

 

A dutch kendo kata book

It is with great pleasure that we announce the publication of a brand new, dutch kendo book.

Nihon Kendo no Kata & Kihon Bokuto Waza” is a translation of Stephen Quinlan-sensei‘s essay on both the traditional kendo kata and on the modern set of waza practices with bokuto. Thomas Sluyter translated the book into the dutch language, in cooperation with Quinlan-sensei.

 

 

 

Availability

The book is available both in print and as a free ebook.

The original, english version can be obtained here.

 

Contents

The following subjects are covered:

 

About the book

As teachers at the Kingston Kendo Club in Canada, Stephen and Christina Quinlan have written many study materials for their students. One of their largest bodies of work is this particular book, “Nihon Kendo no Kata & Kihon Bokuto Waza“. The book combines literal, technical descriptions of each kata with deep backgrounds on the history, and the philosophy behind the kata. Many books by esteemed teachers were referenced to build this comprehensive body of knowledge.

Thomas Sluyter is a relatively new student of kendo at Renshinjuku Kendo in Amstelveen, the Netherlands. As an avid reader of kendo books, he felt that this particular book should be read by as many Dutch kendoka as possible.


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Installing CentOS Linux as default OS on a Macbook

2013-08-12 16:46:00

While preparing for my RHCSA exams, I was in dire need of a Linux playground. At first I could make do with virtual machines running inside Parallels Workstation on my Macbook. But in order to use Michael Jang's practice exams I really needed to run Linux as the main OS (the tests require KVM virtualization). I tried and I tried and I tried but CentOS refused to boot, mostly ending up on the grey Tux / penguin screen of rEFIt

On my final attempt I managed to get it running. I started off with this set of instructions, which got me most of the way. After resyncing the partition table using rEFIt's menu, using the rEFIt boot menu would still send me to the grey penguin screen. But then I found this page! It turns out that rEFIt is only needed in order to tell EFI about the Linux boot partition! Booting is then done using the normal Apple boot loader!

Just hold down the ALT button after powerin up and then choose the disk labeled "Windows". And presto! It works, CentOS boots up just fine. You can simply set it to the default boot disk, provided that you left OS X on there as well (by using the Boot Disk Selector).


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RHCSA achieved

2013-08-12 16:23:00

Huzzah! As I'd hoped, I passed my RHCSA examination this morning. Not only is this a sign that I'm learning good things about Linux, but it also puts me 100% in the green for my continued CISSP-hood: 101 points in domain A and 62 in domain B: 163/120 required points.

I can't be very specific about the examination due to the NDAs, but I can tell a little bit about my personal experience. 

The testing center in Utrecht was pleasant. It's close to the highway and easily accessible because it's not in the middle of town. The amenities are modern and customer-friendly. The testing room itself is decent and the kiosk setup is exactly as shown in Red Hat videos. Personally, I am very happy that RH started with the kiosk exams because of the flexibility it offers. With this new method, you can sit for RHCSA/RHCE/etc almost every day, instead of being bound to a specifc date. 

The kiosk exam comes with continuous, online proctoring meaning that you're not stuck of something goes wrong. In a normal exam situation you'd be able to flag down a proctor and in this case you can simply type in the chatbox to get help. And I did need it on two occasions because something was broken on the RH-side. The online support crew was very helpful and quick to react! They helped me out wonderfully!

I prepared for the test by using two of Michael Jang's books: the RHCSA/RHCE study guide and the RHCSA/RHCE practice exams. If you decide to get those books, I suggest you do NOT go for the e-books because the physical books include DVDs with practice materials. Without going into details of the exams, I found that Jang's books provided me ample preparation for the test. However, it certainly helps to do further investigation on your own, for those subjects that you're not yet familiar with. 


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Security measures all of us can take - part 3

2013-08-10 22:53:00

Here's another follow-up with regards to security matters I believe everybody should know. It's a short one: Email is not safe.

It has been said that you "don't put anything in an email that you wouldn't want to see on the evening news." It's not even a matter of the NSA/FBI/KGB/superspies. Email really is akin to writing something on a postcard: it's legible to anyone who can get his hands on it. And like with the postal service, many people can get their hands on your email. 

Here is an excelent and long read on the many issues with email. But to sum it up:

  1. In general, emails are transfered and stored unencrypted. Anyone on the same network as you can read them in passing. Anyone managing an email server can read the mails stored on them.
  2. Source/sender information is easily spoofed. There is no way to guarantee that an email actually came from whoever's name is at the top. 

These two problems can be worked around in a few rather technical manners, most of which are not very user friendly. The most important one is to use GPG/PGP, which allows you to encrypt (problem 1) and to digitally sign (problem 2) the emails that you send. It certainly helps, but it introduces a new problem: key exchange. You now need to swap encryption keys with all people with whom you'll want to swap emails. But at least it's something. 

In the mean time:

Want to send me an encrypted email? Here's my public key :)


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An update on certifications

2013-08-07 22:09:00

Here's a follow-up post to last year's "Confessions of a CISSP slacker".

By the end of last year I was woefully behind on my CPE (continued professional education) requirements, which are needed to retain my CISSP certification. Not only is CISSP a darn hard exam to take, but ISC2 also need you to garner a minimum of 120 study points each three years. In my first two years, I didn't put in much effort meaning I had a trickle of 51 points out of 120. Thus my emergency plan for making it to 120+ points in the span of a year.

All the calculations were made in the linked article and then I set things into motion. My resolve being strengthened by my personal coach I put together a planning for 2013 that would ensure my success. And my hard work has been paying off, because as of tonight I have now achieved the first milestone: the minimum of 80 points in "domain A" (screenshot above). 

The heaviest hitters in obtaining these 29 points are:

The remaining points were garnered by attending online seminars and by perusing a number of issues of InfoSecurity Professional magazine

Next monday I'm scheduled to be taking my RHCSA (Red Hat Certified System Administrator) exam. I've been working hard the past three months and I'm confident that I'll pass the practical exam on my first go. If I do, that's a HUGE load of CPE because all the study time counts towards my CISSP. That would be roughly 20 hours in domain A (security-related) and 60 hours in domain B (generic professional education). And that, my friend, would put me squarely over my minimal requirements! And I haven't even finished all the items on my wishlist :)


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Public and private parts of this site

2013-07-24 23:38:00

As I wrote earlier I have decided to clamp down on what is publicly published about our lives. This means that >80% of my blog has been turned into a private affair, with only work-related materials still being available to the whole world.

Now that my Macbook has crashed and I need to spend a lot of time waiting for the backups to restore, I have spent roughly eight hours updating my CMS code. It was an interesting learning experience and now this site has a basic login/logout functionality. Logging in will simply let you see the website in all of its original glory.

If I haven't contacted you yet about a username+password and you'd like one, drop me an email.


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