GNU/Linux, Open Source, Cloud Computing, DevOps and more...

Differences between physical CPU vs logical CPU vs Core vs Thread vs Socket

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When we try to know a computer’s architecture and performance at CPU level using Linux commands like nproc or lscpu, we often find out that we are not able to properly interpret their results because we confuse terms such as physical CPU, logical CPU, virtual CPU, core, thread, socket, etc. If we add concepts like HyperThreading (not to be confused with multithreading), we are in a situation where we can not be sure how many cores our box has, we don’t understand why commands like htop indicate that we have 8 cpus when we thought we had bought a single quad-core processor, etc. In short, it’s a mess.

DanielDifferences between physical CPU vs logical CPU vs Core vs Thread vs Socket

15 most useful Linux commands for file system maintenance

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One of the most common and tedious tasks of a sysadmin is to prevent file systems become completely full, because when a server runs out of space the consequences are unpredictable. Depending on how you structured the root file system and if it is divided into different partitions or volumes, those consequences will be more or less severe, but in any case undesirable.

Daniel15 most useful Linux commands for file system maintenance

Still unresolved Shellshock major vulnerability affecting Bash on Linux, Unix and MAC OS X

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Less than two days after it was detected a vulnerability (CVE-2014-6271) that affects the Bash shell on Linux, Unix and Mac OS X, a patch was released that solves this issue only partially, which forced to report a new vulnerability (CVE-2014-7169) still pending. This issue has quickly gained a simple name by which it will be remembered for a long time: Shellshock or Shell Shock.

DanielStill unresolved Shellshock major vulnerability affecting Bash on Linux, Unix and MAC OS X

5 most important reasons to increase your website’s loading speed

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It’s common not to pay much attention to website loading speed as long as it remains between more or less acceptable levels wich don’t make us waiting forever for content. However, web speed is becoming an increasingly important factor and optimization efforts in this area can be decisive for success or failure in achieving our goals.

Below are the top 5 reasons why you should start worrying about website speed and page loading times.

Daniel5 most important reasons to increase your website’s loading speed

5 ways to combat your sedentary work

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For all it’s well known that physical inactivity is bad for health. But not everyone knows how harmful it is, even having reached the rank of a pandemic in this century according to numerous studies. Any person staying long hours sitting in front of a computer while working knows that this causes many inconvenience over time, whether back, shoulders or neck pain, and of course weight gain and overall deterioration of physical condition. In addition there is increasing evidence from numerous studies that sitting long hours on the same position increases up to 50% the chances of developing cardiovascular disease and even various forms of cancer.

Daniel5 ways to combat your sedentary work

What is Web Architecture?

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Technology Architecture

Before you can get to define what web architecture is, first it is necessary to frame it properly. There are some roles related to architecture within the Information Technology industry, but basically we can do the following division:

DanielWhat is Web Architecture?

Fixing Qtranslate slug problems

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There are basically two options when creating a multi-language website based on WordPress. One involves duplicating posts and pages by creating one different post for each language, wich is the approach followed by some plugins like WPML, Polylang or xili-language. Another approach is to introduce all the translations into the same post, separated by meta-tags within the content itself.

DanielFixing Qtranslate slug problems

Google XML Sitemaps v3 for qTranslate doesn’t work with Qtranslate Slug

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One of the most widespread options to create a multi-language site with WordPress is to use the qTranslate plugin, wich works pretty well and it’s free. Perhaps the most sensitive aspect of multilingual sites ​​is URL translation, since it affects website’s information architecture and search engine optimization (SEO).

DanielGoogle XML Sitemaps v3 for qTranslate doesn’t work with Qtranslate Slug