A utility that I use quite a lot on a Gentoo system is called eix. This tool allows me to search for packages by name and list all available flags. The document on the Gentoo Wiki is great and has detailed explanation about it. In this blog post, I’m just going to write down what I did to get it installed. I want to set its flag to use qlite. # echo 'app-portage/eix sqlite' > /etc/portage/package.use/eix Then proced with the installation: ...

A short while back, after exporting my blog from WordPress to Hugo I noticed that there were some weird ^M characters in some files as shown in the following screenshot in blue. This is a special character, CTRL+M and can be removed using sed or vim. Using vim we can replace/substitute a text with the following command: %s/MATCH-TEXT/WITH-NEW-TEXT/g Therefore, we should be able to replace ^M, by typing CTRL+V then CTRL+M, with an empty space as so: ...

Yesterday while I was running system update on my home desktop, I noticed the armadillo package has been upgraded. I was pretty sure I never requested to have it installed on this desktop. The package name, though, looks very interesting. Upon looking it up, I found out that Armadillo is a C++ library for linear algebra. Coincidentally, I’ve been reviewing C++ during this end of year holiday. So it’s like a very good time to try this library out. ...

The first programming language I took when I started my undergraduate study in computer science was C. The second language was C++, taken in the following semester.I really liked C/C++ back then, but I never got a chance to actually use C/C++ in any real-life project. After transfering to the University of Auckland in New Zealand, I had to pick up Java as almost all computer science courses taught in Java back in early 2000. ...

Last week I passed the Red Hat exam, Certificate of Expertise in Ansible Automation (EX407), and I just want to note down my experience of taking this exam. The exam duration is 4 hours, and I was able to complete all the questions in 3 hours and 45 minutes. Was it because questions were difficult? No, on the contrary in my opinions questions aren’t very difficult, comparing to the Ansible learning material in D407. Speaking about learning material, to prepare for the EX407 exams, I went through 2 courses: D407R (recording) and D407VC (Video Classroom). Apart from that, I have also been using Ansible at work for quite awhile. ...