DevOps and Development

CMD is Docker instruction used if you need a default command which users can easily override. ENTRYPOINT is used when you want to define a container with a specific executable. You cannot override ENTRYPOINT when starting a container. Combine ENTRYPOINT with CMD if you need to have a container with a specified executable and a default parameter which can easily be modified.

Git is a version control system that allows developers to track a project and actively contribute without interfering in each other’s work. Learn how to install Git, with four different installation approaches and get started with using the system. Configure Git and see how to track and commit changes.

Persistent Volumes are used in Kubernetes orchestration when you want to preserve the data in the volume even after a specific pod has finished claiming it. It is a way of connecting a container to external storage through a series of abstractions. Learn more about this useful Kubernetes feature here.

This article presents basic security principles such as defense-in-depth and restricted privilege. Learn how to apply these principles in a distributed system such as a Kubernetes cluster.

This tutorial provides instructions on installing Python 3 and Python 2 on CentOS 8 with guidance on how to set the default version of Python.

For running and developing applications with Java on CentOS 8, you need to set up the Java Development Kit (JDK). There are two different implementations of JDK – OpenJDK and Oracle JDK. Learn how to install Java on CentOS 8, set up the default Java version, and the JAVA_HOME environment variable.

This article is a step-by-step tutorial on how to install Git on CentOS 8. As a popular version control system, Git organizes the development cycle of an application, keeps track of code changes, creates branches, and allows collaboration within a software team. Install Git from the CentOS 8 repository or its source code by following the instructions in this guide.

CentOS 8 does not provide official support for Docker. This article clearly shows you how to install a fully functional version of Docker regardless.

Microservices are a system used to develop an application, built on a selection of individual services working together to ensure seamless and highly responsive performance. If you are building a complex, multi-functional app, you should consider using the microservice architecture.

Container deployment took the software development world by storm. Use the outlined guidelines and learn how to get the most out of the container images and Kubernetes. The more of these concepts you apply in practice, the more effective your system will be.