A reference application is a sample application that is used as a guide for developers to learn and implement best practices for software development, testing, deployment, and operations within a specific technology stack or framework. It can serve as a blueprint for building and maintaining similar applications and can be used to demonstrate the use of tools, processes, and techniques for achieving high levels of automation, scalability, and reliability. If you are learning how to deploy applications to Kubernetes of Virtual Machines in cloud, create your own tiny application.

NFS Server To run your own NFS (Network File System) server, you’ll need to first install Linux on your server. I’d go with Debian, Ubuntu or CentOS distributions. Once you’ve done that, you can install the NFS server software, which is typically included with most Linux distributions. After the NFS server software is installed, you’ll need to configure it to specify which directories on the server should be shared with NFS clients, and what type of access they should have.

syslog Syslog is a standard for logging system events on Unix and Linux systems. It is typically used to collect and store log messages from various applications and system components, such as the kernel, system libraries, and applications. Syslog uses a client-server model, where each client application sends log messages to a central syslog server, which then stores the messages in a log file. The syslog server can also forward the log messages to other syslog servers or send them to a log management system for further analysis.

There are many tools and software programs that can be used for monitoring and performance analysis on Linux systems. Some popular options include: top - This is a command-line utility that shows real-time information about the processes running on a Linux system, such as their CPU and memory usage. htop - This is a more advanced version of top that provides a more user-friendly interface and additional features, such as the ability to sort processes by different metrics and to kill processes.

To run your own email server using Linux and other open source software, you’ll need to first choose a Linux distribution and install it on your server. I’d go with either Ubuntu, Debian or Rocky Linux. Once you’ve done that, you can choose an email server software that is compatible with Linux, such as Postfix or Exim. After installing and configuring the email server software, you’ll need to set up DNS records and configure authentication and encryption to ensure that your email server is secure.

Definition A load balancer is a type of software or hardware that distributes incoming traffic across multiple servers or resources. This allows the load balancer to distribute the workload evenly, improving the performance and availability of the application. The Load Balancer Lab To run your own load balancer using open source software, you will need to: Install and configure the load balancer software on a server. Some popular open source options include HAProxy, Nginx, and Envoy.

Your web applications need a solution to store and retrieve its data. A relational database is often used in web applications. MySQL, MariaDB and PostgreSQL are some popular relational databases. There’s also SQLite. Many applications can use any of these relational databases by the virtue of the database layer abstraction. If you are writing your own web application, pick any one database and install it on your web server. Install The Database Install the package.

As soon as you are ready to deploy services and applications on the Internet, the first thing you need is a registered domain and a DNS server. Often people just use the DNS service provided by the domain registrar or the hosting or cloud provider. Using the managed service is not a requirement. You can host your own DNS server and manage the DNS for your domains. There are many open source software using which you can build your own DNS servers.