today's howtos

• nginx, lua, uuid and a nchan bug

• Installing TravisCI Ruby Gem on Fedora 28

• Modifying Firefox Files Inside Omni.ja

• Ubuntu 18.04 LTS Server (Bionic Beaver) Installation Guide with Screenshots

• How To Install Apache on Ubuntu 18.04

• How to Archive Your Data (Virtually) Forever

KDE: Qt, Plasma, QML, Usability & Productivity

• Qt 5.11.1 and Plasma 5.13.1 in ktown ‘testing’ repository

  A couple of days ago I recompiled ‘poppler’ and the packages in ‘ktown’ that depend on it, and uploaded them into the repository as promised in my previous post. I did that because Slackware-current updated its own poppler package and mine needs to be kept in sync to prevent breakage in other parts of your Slackware computer. I hear you wonder, what is the difference between the Slackware poppler package and this ‘ktown’ package? Simple: my ‘poppler’ package contains support for Qt5 (in addition to the QT4 support in the original package) and that is required by other packages in the ‘ktown’ repository.

• Sixth week of coding phase, GSoC'18

  The Menus API enables the QML Plugin to add an action, separator or menu to the WebView context menu. This API is not similar to the WebExtensions Menus API but is rather Falkonish!

• This week in Usability & Productivity, part 24

  See all the names of people who worked hard to make the computing world a better place? That could be you next week! Getting involved isn’t all that tough, and there’s lots of support available.

Programming: Python Maths Tools and Java SE

• Essential Free Python Maths Tools

  Python is a very popular general purpose programming language — with good reason. It’s object oriented, semantically structured, extremely versatile, and well supported. Scientists favour Python because it’s easy to use and learn, offers a good set of built-in features, and is highly extensible. Python’s readability makes it an excellent first programming language. The Python Standard Library (PSL) is the the standard library that’s distributed with Python. The library comes with, among other things, modules that carry out many mathematical operations. The math module is one of the core modules in PSL which performs mathematical operations. The module gives access to the underlying C library functions for floating point math.

• Oracle's new Java SE subs: Code and support for $25/processor/month

  Oracle’s put a price on Java SE and support: $25 per processor per month, and $2.50 per user per month on the desktop, or less if you buy lots for a long time. Big Red’s called this a Java SE Subscription and pitched it as “a commonly used model, popular with Linux distributions”. The company also reckons the new deal is better than a perpetual licence, because they involve “an up-front cost plus additional annual support and maintenance fees.”

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