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....
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....
FreeBSD 12.0-RELEASE was released today, and that means it’s time to upgrade 2 of FreeBSD 11.2 machines to this latest version. One of my FreeBSD boxes is a desktop used at work, and the upgrade went well without any issues. In this post, I’m going to document how the upgrade is done on my nas server at home. First ensure that the FreeBSD is up to date: root@nas:~ # freebsd-update fetch src component not installed, skipped Looking up update....
To manage firewalld on a desktop, I use the module created by Craig Dunn available at https://github.com/crayfishx/puppet-firewalld. Recently, I came across this issue for the second time after restarting puppetserver: # puppet agent -vt Info: Using configured environment 'production' Info: Retrieving pluginfacts Info: Retrieving plugin Info: Loading facts Error: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Resource Statement, Evaluation Error: Error while evaluating a Resource Statement, Could not autoload puppet/type/firewalld_rich_rule: /etc/puppetlabs/code/modules/firewalld/lib/puppet_x/firewalld/property/rich_rule_action....
After spending almost 8 weeks preparation, I finally took the Red Hat Certified Engineer (RHCE) exam yesterday. I found the questions are not very difficult, however it’s very easy to make mistakes. The exam duration is 3.5 hours and I had about 15 minutes left when I completed the last question. Having done the the Red Hat Certified System Administrator (RHCSA) before, I remember if you receive an email from Red Hat with an attachment, that implies that you pass the exam....
As a ThinkPad fan, I really like X1 Carbon (G6). I run Fedora 28 on it, and almost everything runs flawlessly. One issue that bothers me a lot is problem with suspend. The X1 Carbon G6 supports S0i3 instead of the S3. Without the S3, when the laptop is put to suspended, the battery continue to drain and sometimes the cpu fan keeps running. Fortunately, this issue has been recently addressed by Lenovo through firmware update....
This is like a re-post of a question from askubuntu.com. To get to that post, I usually had to google it. So, I’ll post it here so I know where to look for when I need it again. At work, we use WPA2-Enterprise for wireless connection. To create a new connection on my laptop with wlp3s0 as Wifi device, follow this step: That’s it if you know how to do it....