How to Setup IP Reverse Lookup

Setting up an IP reverse lookup requires configuring reverse DNS (rDNS) records, which map IP addresses back to hostnames. This process is typically managed by the organization responsible for your IP allocation, such as an internet service provider (ISP), a domain registrar, or a hosting provider. Here are the general steps to set up an […]

How to Set Up DomainKeys Identified Mail (DKIM) for Your Email Server

Setting up DomainKeys Identified Mail (DKIM) is essential for email security and helps to ensure that your emails are not tampered with in transit. It involves a digital signature added to the email’s header, allowing the receiving email server to verify that the email message was indeed sent from your domain and has not been […]

How to Set Up DMARC (Domain-based Message Authentication, Reporting, and Conformance) for Your Email Server

Setting up DMARC (Domain-based Message Authentication, Reporting, and Conformance) for your email server involves several steps, including understanding SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) settings, since DMARC relies on these technologies. DMARC helps protect your domain from unauthorized use, such as phishing scams and email spoofing. Here’s a step-by-step guide to get […]

How to Uninstall Applications that TestFlight Installs on Your Mac

Uninstalling an app on macOS that was installed via TestFlight can be done similarly to removing any other app on your Mac. Here are the steps to follow: 1. Delete the App from the Applications Folder Using Finder: Open Finder. On the menu bar at the top of the screen, select “Go” and then “Applications” […]

How to Develop Custom NuGet Package

Developing your own NuGet package involves the following steps: Create a Project: Start by creating a new project in your preferred development environment, such as Visual Studio or JetBrains Rider. Add Library Code: Write the code that constitutes your library or package. This could include classes, interfaces, utilities, or any other components that you want […]

How to Convert Windows-style Line Endings to UNIX-style Line Ending

You can convert line endings of your script to UNIX format using a utility like dos2unix. Install dos2unix if it’s not already available on your system. You can use the package manager for your Linux distribution to install it. Open a terminal and navigate to the directory where your script is located. Run the following […]

How to Remove a GIT Submodule

To remove a Git submodule, you can follow these steps: Open a terminal or command prompt and navigate to the root directory of your Git repository. Run the following command to see a list of submodules in your repository: git submodule status This will display the submodule path and commit hash. Identify the submodule you […]

How to Develop a Custom WordPress Shortcode That Lists Blog Posts

To list blog posts using a shortcode, you can create a custom shortcode that utilizes the WP_Query class to retrieve and display the posts. Here’s an example of how you can create the shortcode in your theme’s functions.php file: function blog_posts_shortcode($atts) { $atts = shortcode_atts(array( ‘posts_per_page’ => 10, ‘category’ => ”, ‘orderby’ => ‘date’, ‘order’ […]

How to Find Your MySQL Configuration File On Ubuntu

On Ubuntu, the MySQL configuration file is typically located at /etc/mysql/mysql.conf.d/mysqld.cnf. However, the actual location of the configuration file may vary depending on the version of MySQL you have installed and any customization you may have made. Here are a few common file paths for the MySQL configuration file on Ubuntu: /etc/mysql/mysql.conf.d/mysqld.cnf /etc/mysql/mysql.conf.d/mysqld.cnf /etc/mysql/mariadb.conf.d/50-server.cnf /etc/my.cnf […]

How To Increase Maximum Allowed MySQL Connections on Your Ubuntu Server

To increase the maximum allowed MySQL connections on your Ubuntu server, you need to adjust the max_connections setting in the MySQL configuration file. Here’s how you can do it: Open a terminal on your Ubuntu server. Edit the MySQL configuration file using a text editor. For example, you can use the following command to edit […]

How to Get Operating System Details from the Linux Command Line Interface (CLI)

To obtain operating system details from the Linux command line interface (CLI), you can use the lsb_release command or the uname command. Here’s how you can use both of these commands: Using lsb_release: Open a terminal and run the following command: lsb_release -a This will display detailed information about your Linux distribution, including the distributor […]

How to Terminate Sleeping MySQL Processes with a Linux Bash Script

Here’s an example of a Linux bash script that checks for sleeping MySQL processes and terminates them: #!/bin/bash # MySQL connection details DB_USER="your_username" DB_PASS="your_password" # Get the list of sleeping processes from MySQL PROCESS_LIST=$(mysql -u $DB_USER -p$DB_PASS -Bse "SELECT ID FROM information_schema.processlist WHERE COMMAND = ‘Sleep’;") # Iterate over the sleeping processes and kill them […]

How to See the Current Maximum Allowed Connections in A Running MySQL Instance

To see the current maximum allowed connections (max_connections) in a running MySQL instance, you can connect to the MySQL server and execute the following SQL query: SHOW VARIABLES LIKE ‘max_connections’; You can use a MySQL client like the mysql command-line tool to execute the query. Open a terminal on your Ubuntu server and run the […]