This is an introduction to the Tail command, available on Unix/Linux systems. Tail has many applications, but this video concentrates on its basic usage and useful options, as they pertain to Drupal developers.
You'll learn how to take a quick peek at recent log messages from a single log file, how to do the same thing with multiple logs, as well as watching log files in real time! We'll finish up with a practical application, to see why this is useful.
Commands used in this video:
To view the documentation (or manual) for the tail command:
man tail
To show the last 20 lines of the webserver's access log file:
tail /var/log/apache2/access.log
To show the last 20 lines of the webserver's error log file:
tail /var/log/apache2/error.log
To show the last 20 lines of the webserver's error log file and continue to print new lines added to the file:
tail -f /var/log/apache2/access.log
In this tutorial, I'll introduce the API Blueprint specification and take a look at a few tools we can use to provide documentation and testing for our API.
The tools we'll look at include:
By the end of the tutorial you'll have a better understanding of the API Blueprint specification and be able to use Dredd and Aglio to ensure your API documentation and testing stay up-to-date.
Self-check question: Could you write a script that could be run after every commit that would keep your documentation up-to-date, and provide API test results?
Additional resources
Git
TopicThe Git version control system can help you keep track of changes in your codebase and make sure you don't unintentionally lose work.
Security
TopicKeeping a Drupal site secure requires monitoring security announcements, performing regular updates, and knowing how to properly use Drupal’s APIs to write secure code.
Drupal Composer Project
TopicThe Drupal Composer Project provides a scaffold for starting a new Drupal project and managing that project's dependencies with Composer. It was created before the drupal/recommended-project Composer project template was developed, which is the current best practice method for creating a new Drupal site with Composer.
HTML and CSS
TopicHTML and CSS are the foundational languages for how browsers display web pages.
YAML
TopicYAML, which stands for YAML Ain't Markup Language, is a human-readable data serialization format that's been widely adopted in a variety of use cases in Drupal.
Xdebug
TopicDebugging your Drupal codebase can be made substantially easier by learning how to enable and configure the Xdebug PHP extension.
Learn about resources to guide you through the process of updating a module or theme to the latest version of Drupal.
Themes provide the HTML, CSS, JavaScript, and other assets that are responsible for the look and feel of your site.
Drupal Core Modules
TopicA module is a set of PHP, JavaScript, and/or CSS files that extends site features and adds functionality. The Drupal core software comes with a set of modules that provide a range of features.
Introduction to Drupal
Guide
JavaScript
TopicJavaScript (JS) is an interpreted programming language that is widely used on the web to control web page behavior and interactivity.
Learn Drupal
Guide
Drupal Console
TopicDrupal Console provided a command line utility for performing common site administration tasks, code generation scaffolding, and a Read-Evaluate-Print-Loop for interacting with your Drupal site.
It is no longer actively maintained. Use Drush instead.