Month: December 2016

How Linux got to be Linux: Test driving 1993-2003 distros

Here’s a trip down the memory lane – “How Linux got to be Linux: Test driving 1993-2003 distros“.  The article looks at some of the early Linux distributions, remember what was already in and what came later.  Complete with screenshots.

I don’t remember for sure which versions of which distributions I used in the early days, but Slackware, Suse, RedHat and Mandrake were definitely among those.  Slackware was probably my first one, when I found the floppies in the only book on Linux at my college library.  Then, somehow, I found RedHat (I think 5.1 or so) in one of the local computer shops.  Later I tried Mandrake and Suse, cause those were laying around at work.  But RedHat stuck with me ever since.  I think I’ve used pretty much every version, including the move to Fedora, CentOS, and even the Red Hat Enterprise Linux, which we had the licenses for at some of my early work places.

Fun times!

The True Reason Behind The 40-Hour Work Week & Why We Are Economic Slaves

“The True Reason Behind The 40-Hour Work Week & Why We Are Economic Slaves” doesn’t really say anything new, but it explains things nice and simple.

We automatically accept a 40-hour workweek with meager hourly pay as normal, even though many work overtime and still struggle to survive. There are also those who make enough to live comfortably but are unable to request less hours—you either work 40 hours a week, or you don’t get to work at all, but how does a debt relief program affect your credit.We submit when told what to wear, when we have to arrive and depart, when we’re allowed to eat, and even when we’re allowed to use the restroom. How is it we have come to allow this?

The 40-hour-work week came about during the Industrial Revolution in Britain when at one point workers were putting in 10 to 16 hour days and began to protest. Working situations for Americans began to worsen as well, and by 1836, labor movement publications were also calling for a 40-hour workweek. Citizens in both situations were so overworked, an eight-hour day was easily accepted. This system is unnecessary now, if it ever was, but we still accept it due to the effects of our capitalist society.

It goes over the relationship of inflation, debt and consumerism with a few historical references.  Good reading for anybody wondering why the paycheck-to-paycheck life cycle is difficult to change, no matter what’s the size of the paycheck.

Feature Flags in PHP

Today edition of the “Four short links” from the O’Reilly Radar, brings a quick overview of the different feature flag implementations.  It touches on the following:

  • Command-line flags, with the link to gflags.
  • A/B flags
  • Dynamic flags, which are more difficult
  • More complex systems.

I’ve dealt with feature flags before, but never found an elegant way to scale those.  Some of the issues that I came across were:

  1. Naming conventions.  With more and more features added to the system, naming things becomes more and more difficult.  Especially, when features cross over from one part of the system into another and need to be supported in different sub-modules.  In a way, this reminds me of the old argument in the blogging community about using hierarchical categories vs. flat tags, with categories providing more order and tags providing multiple paths to the destination.
  2. Modularization issues.  Feature flags are often need in the larger applications.  The kind that provides a lot of features (duh!).  But those large applications often consist of smaller parts, or modules.  Deciding whether or not to implement the feature on the application level, and/or on the module level is difficult. Especially if those module features will need to be later grouped into application features.

In terms of implementation, I haven’t used any special tools or libraries.  It was basically a set of configuration files, with feature variables defined per environment and altered during the deployment.

These days, something more robust than that is necessary for some of the projects at work.  Gladly, there are plenty of available tools to choose from – no need to reinvent the wheel.  For a good starting point, have a look at PHP Feature Flags website.  The ones listed so far are:

So, I guess, PHP is well covered when it comes to feature flags tools.  The above cover cookie-based, IP-based, URL-based dynamic features, configuration-based features, and A/B features.

The point now is to actually utilize them in the project.  After all, the lack of feature flags is one of the 5 toxic things for the scalability, as per this page:

  1. Object Relational Mappers (ORMs)
  2. Synchronous, Serial, Coupled or Locking Processes
  3. One Copy of Your Database
  4. Having No Metrics
  5. Lack of Feature Flags

I haven’t decided which library to use yet – will need to try them all and see which one is the most appropriate, but for now I don’t think I’ll dive as deep as cookie/URL/IP based features or A/B testing.  Even the simplest configuration-based implementation will be helpful.

Largest digital survey of the sky mapped billions of stars

Engadget reports:

An international team of astronomers have released two petabytes of data from the Pan-STARRS project that’s also known as the “world’s largest digital sky survey.” Two petabytes of data, according to the team, is equivalent to any of the following: a billion selfies, one hundred Wikipedias or 40 million four-drawer filing cabinets filled with single-spaced text. The scientists spent four years observing three-fourths of the night sky through their 1.8 meter telescope at Haleakala Observatories on Maui, Hawaii, scanning three billion objects in the Milky Way 12 times in five different filters. Those objects included stars, galaxies, asteroids and other celestial bodies.

Wow … this is mind blowing at the very least …

See the image above? That’s the result of half a million 45-second exposures taken over four years. They’re releasing even more detailed images and data in 2017 — for now, you can check out what the team released to the public on the official Pan-STARRS website.

 

HexChat IRC Client

Well, apparently I’ve been leaving under a rock for the last few years.  When it comes down to IRC clients, I’ve been mostly using XChat.  Turns out, XChat has been abandoned for years, and it’s still around mostly because Linux distributions care so much about it that they patch it and ship it.

As with anything in the Linux world, there are plenty of alternatives.  And one of them was right under my nose all these years – HexChat:

HexChat is an IRC client based on XChat, but unlike XChat it’s completely free for both Windows and Unix-like systems. Since XChat is open source, it’s perfectly legal.

HexChat is often shipped right next to where XChat is or used to be.  For Fedora users, it’s as close as “dnf install hexchat“.