Boot partitions from installations prior to the 16.04 era are terribly small. When you install updates and encounter errors due to a full /boot partition, consider risizing it.

If you can't do the steps described below, ask someone experienced ...

So you want to know if you are on natty, precise, quantal, or something else? Check /etc/lsb-release.

$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.2 LTS"
``...

By convention, common protocols use a defined port, like 80 for HTTP or 443 for HTTPS.

You can use nmap to find out what service is running behind a given port, and most often see some details about it. This can be helpful if servers don't offe...

If others on a call (Skype, SIP, ...) can not hear you loud enough, your volume levels are probably too low. Also, Skype may be changing your mixer levels.

Set a proper recording volume

1. Open your mixer software (run pavucontrol).
2. Switc...

When deploying, Capistrano puts a REVISION file into your application's release directory. It contains the hash of the commit which was deployed.

If you want to know the currently deployed release, simply SSH to a server and view that file.

``...

Or: How to avoid and refactor spaghetti code

Please note that I tried to keep the examples small. The effects of the methods in this card are of course much more significant with real / more complex code.

What are the benefits of more modular ...

So you downloaded a theme for Chrome a while ago and don't remember which one it is?

You can go to chrome://settings/appearance (on Chrome 61+) to see the theme's name, and click a link to open it in the Chrome Web Store.

If you are on an olde...

This is a checklist I use to work on issues. For this purpose I extracted several cards related to the makandra process and ported them into a check list and ref...

This guide shows how to create an AngularJS application that consumes more and more memory until, eventually, the browser process crashes on your users.

Although this guide has been written for Angular 1 originally, most of the advice is relevant...

Occasionally you need to do something directly on the server -- like having all records recalculate something that cannot be done in a migration because it takes a long time.

Let's say you do something like this:

Project.all.each(&:recal...