apache mod_rewrite module guide - part 1

apache mod_rewrite module guide - part 1
mod_rewrite is an Apache module that allows for server-side manipulation of requested URLs. Incoming URLs are checked against a series of rules. The rules contain a regular expression to detect a particular pattern. If the pattern is found in the URL, and the proper conditions are met, the pattern is replaced with a provided substitution string or action. This process continues until there are no more rules left or the process is explicitly told to stop.

Apache server - Terms Used to Describe Directives

Apache server - Terms Used to Describe Directives

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.

URL

A complete Uniform Resource Locator including a scheme, hostname, and optional pathname as in http://www.example.com/path/to/file.html/

URL-PATH

The part of a url which follows the scheme and hostname as in /path/to/file.html. The url-path represents a web-view of a resource, as opposed to a file-system view.

How to Properly Add JavaScripts and Styles in WordPress

How to Properly Add JavaScripts and Styles in WordPress

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.

Remove Query Strings in WordPress CSS styles and JS Scripts

Remove Query Strings in WordPress CSS styles and JS Scripts

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.

SystemD - Managing System Services (part 2)

SystemD - Managing System Services (part 2)

Previous versions of Linux distributions like Debian or Ubuntu, which were distributed with SysV init or Upstart, used init scripts located in the /etc/rc.d/init.d/ directory. These init scripts were typically written in Bash, and allowed the system administrator to control the state of services and daemons in their system. With systemd these init scripts have been replaced with service units.

Service units end with the .service file extension and serve a similar purpose as init scripts. To view, start, stop, restart, enable, or disable system services, use the systemctl command as described in Table 2.1 - systemctl utility

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