Boot partitions from installations prior to the 16.04 era are terribly small. When you install updates and encounter errors due...
You might have some trouble running a Rails LTS 2 app with MySQL 5.7. If you don't want to...
Note netstat has mostly been superseeded by its more modern rewrite ss which nowadays comes pre-installed rather than netstat...
Git has two kind of tags: annotated lightweight Annotated tags are stored as full objects in the Git database. They...
We're usually running Ubuntu LTS versions. Sometimes newer hardware requires packages from more recent Ubuntu releases that only come...
A common pattern in Ruby is to to require all files in a specific diretory, using something like Dir.glob(Rails.root.join...
An end-to-end test (E2E test) is a script that remote-controls a web browser with tools like Selenium...
Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking...
If you are using PDFKit / wkhtmltopdf, you might as well want to use custom fonts in your stylesheets. Usually this...
Let's say you have a folder images and want to to move all files in there to a new...
On my Ubuntu MATE machine, switching applications with ALT + TAB was impossible, because it took nearly 2 seconds. The culprit...
I frequently find myself needing a combination of group_by, count and sort for quick statistics. Here's a method...
If you want to ssh into your vagrant box without switching into the project directory and typing vagrant ssh, you...
You can use local copies of gems in your Gemfile like this: gem 'spreewald', path: '~/gems/spreewald' As soon as you...
You can configure a Ubuntu system as a gateway in order to share it's internet connection (maybe via WLAN...
Luckily, this is simple. Just install three packages: sudo apt install ipheth-utils libimobiledevice-dev libimobiledevice-utils
When you load a dump for development, records may reference images that are not available on your machine.
Using VCR to record communication with remote APIs is a great way to stub requests in tests. However, you may...
Line-height and vertical-align are simple CSS properties. So simple that most of us are convinced to fully understand...
Web technology is a broad field and you cannot be an expert in all aspects. However, it is useful to...
We generally use multiple application servers (at least two) and you have to search on all of them if you...
We have projects that have been developed using many different versions of Ruby. Since we do not want to...
A comprehensive introduction to sending HTML emails. Intro: HTML email: Two words that, when combined, brings tears to a developer...
Exercise 1: XML On the start page of your Movie DB, show the title of a random movie that is...