Redis is an open-source, in-memory, data-structure store with optional disk writes for persistence, which can be used as key-value database, cache and message broker. Redis features built-in transactions, replication, and support for a
variety of data structures such as strings, hashes, lists, sets and others. Redis can be made highly available with Redis Sentinel and supports automatic partitioning with Redis Cluster. This document provides both instructions for depl
oying the Redis server and an overview of best practices for maintaining Redis instances.

It’s possible to run more than one Skype account on your computer at the same time. This might be useful if you have, for example, a Skype account you use for work and another account just for personal use. If you want to be signed in to both accounts at the same time, you need to start a new instance of Skype.

Be aware that if you have multiple instances of Skype running, you may need to use the Task Manager to close Skype.

Have you sometime a question what is url, url-path, file-path, regex, mime-type and more? The answer is in this article. We describe a basic terms used to describe apache webserver directives.

Directives use a great number of different argument types. A few common ones are defined below.

Do you want to learn how to properly add JavaScripts and CSS stylesheets in WordPress? Many DIY users often make the mistake of directly calling their scripts and stylesheets in plugins and themes. In this article, we will show you how to properly add JavaScripts and stylesheet in WordPress. This will be particularly useful for those who are just starting to learn WordPress theme and plugin development.

Often times, adding custom JavaScript for analytics tracking is the first type of custom code a WordPress user has to implement. Normally the documentation that you are given with these codes are written as if your site is just a bunch of HTML files. But that’s not how WordPress works. The HTML of your site is dynamically generated.

When you’re optimizing your website, you’ve probably noticed a page speed score telling you to remove query strings from your CSS and JavaScript files in WordPress. Query strings are URLs that have either ? or &.

But why do these appear in the URLs and what’s the cause? Actually query strings are used by plugin developers to push updates.

The static resources (like CSS and JS files) are usually cached by proxy servers or CDNs. And when a developer has to push an update, it won’t be rendered immediately because of the caching effects. Which is why they use query strings to instantly render updates, as query strings won’t be cached. But as a side effect, since they are not cached, they contribute to the loading time of a web page.