How to Include Category and Subcategory in WordPress URLs

Watch out! This tutorial is over 4 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

WordPress comes with two built-in taxonomies to sort your content. They are called categories and tags.

As you probably know, categories are typically used for more broader topics and can have subcategories.  However, if you are using the default WordPress URL structure, then your categories and subcategories are not included in the post URLs by default.

Continue reading

How to Link to External Links from the Post Title in WordPress

Watch out! This tutorial is over 4 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

Do you want to add an external link as post title in WordPress? Sometimes you may just want to share a link with your users. Instead of sending them to a post, you may want the post title to link to the other website. In this tutorial, we will show you how to link to external links from the post title in WordPress.

Continue reading

Strings in Ruby

Watch out! This tutorial is over 4 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

Ruby has many ways of making strings, which are generally variations of the many ways Perl has of making strings. Double quotes allow values to be interpolated into the string, while single quotes do not. Most escapes are treated literally in single quotes, including the fact that \n is treated as two characters, a backward slash followed by an n.

Continue reading

How To Set Up SSH Keys

Watch out! This tutorial is over 4 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

SSH keys provide a more secure way of logging into a virtual private server with SSH than using a password alone. While a password can eventually be cracked with a brute force attack, SSH keys are nearly impossible to decipher by brute force alone. Generating a key pair provides you with two long string of characters: a public and a private key. You can place the public key on any server, and then unlock it by connecting to it with a client that already has the private key. When the two match up, the system unlocks without the need for a password. You can increase security even more by protecting the private key with a passphrase.

Continue reading

Manually Create a Sticky Floating Footer Bar in WordPress

Watch out! This tutorial is over 4 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

A sticky floating footer bar allows you to prominently display your important content to users. This bar remains visible to users at all time, so they are more likely to click on it and discover more useful content.

This method requires you to add code in your WordPress files, so we will be using the File Manager plugin, already installed on the DkIT WordPress servers.

Continue reading

Introduction to Java

Watch out! This tutorial is over 4 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

JAVA was developed by Sun Microsystems Inc in 1991, later acquired by Oracle Corporation. It was conceived by James Gosling and Patrick Naughton. It is a simple programming language.  Writing, compiling and debugging a program is easy in java.  It helps to create modular programs and reusable code and is ‘platform independent’.

Continue reading

Getting Started with the Computing Department WordPress Infrastructure

Watch out! This tutorial is over 4 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

The Department of Computing & Mathematics at DkIT has a very advanced WordPress Infrastructure for use by students in their class work and end of year projects.  We use a Viglen IX2300 (2 x Quad Core Xeon CPUs, 12 GB RAM, 2 x 146 GB SATA disks) for the primary web server, and two Viglen HX2220i units provide MySQL Database Replication, failover and load balancing services to the master web server. These servers are all powered by Debian Linux.

Also, traffic to the servers is cached at the college’s main reverse proxy server (regardless of source). The result is a very fast setup indeed!

Continue reading