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Jenkins is the most popular open-source, Java-based automation server that allows you to easily set up a continuous integration and continuous delivery (CI/CD) pipeline.

Vim has its own terminology for copying, cutting, and pasting. Copy is called yank (y), cut is called delete (d), and paste is called put (p).

Git remote is a pointer that refers to another copy of the repository that is usually hosted on a remote server. In some situations, like when the remote repository is migrated to another host, you need to change the remote’s URL. This guide explains how to change the URL of a Git remote.

This tutorial explains how to install a free Let’s Encrypt SSL certificate on CentOS 8 running Apache as a web server. We’ll use the certbot tool to obtain and renew the certificates.

The history command displays a list of previously executed commands.

PostgreSQL, often known simply as Postgres, is an open-source general-purpose object-relational database management system. This tutorial walks you through the steps of installing PostgreSQL database server on Debian 10. We’ll also explore the fundamentals of basic database administration.

Node.js is a cross-platform JavaScript runtime environment built on Chrome’s JavaScript. In this article, we’re going to walk you through two different ways to install Node.js and npm on CentOS 8.

The pstree command displays the running processes in the form of a tree structure.

Often, when working on a project that uses Git, you’ll want to exclude specific files or directories from being pushed to the remote repository. The .gitignore file specifies what untracked files Git should ignore.

MySQL is the most popular open-source relational database management system. The latest version of the MySQL database server, version 8.0, is available for installation from the default CentOS 8 repositories. In this tutorial, we will show you how to install and secure MySQL 8.0 on CentOS 8 systems.

PHP is one of the most used server-side programming languages. Many popular CMS and frameworks such as WordPress, Magento, and Laravel are built in PHP. In this guide, we will discuss how to install PHP 7.2, 7.3, or 7.4 on CentOS 8.

Nginx writes records of its events in two types of logs: access logs and error logs.

The dmesg command allows you to view and control the kernel ring buffer. It can be very useful when troubleshooting kernel or hardware issues.

Network File System (NFS) is a distributed file system protocol that allows you to share remote directories over a network. With NFS, you can mount remote directories on your system and work with the files on the remote machine as if they were local files.

Apache HTTP server is the most widely used web server in the world. It is a free, open-source, and cross-platform HTTP server, including powerful features, and can be extended by a wide variety of modules.

This article shows how to list tables in a MySQL or MariaDB database via the command line.

Git is a distributed version control system that’s being used by most software teams today.

The RPM Package Manager (RPM) is a powerful package management system used by Red Hat Linux and its derivatives such as CentOS and Fedora. RPM also refers to the `rpm` command and `.rpm` file format. In this tutorial, we will talk about how to use the `rpm` command to install, update, remove, verify, query, and otherwise manage RPM packages.

Connecting to a running Docker container is helpful when you want to see what is happening inside the container. In this tutorial, we will explain how to attach to the container's main running process and how to get a shell to a running container.

All data types in Python, including integers and strings, are objects. Often when writing Python code, you will need to convert one data type to another. For example, to perform a math operation on a number represented as a string, it needs to be converted into an integer. In this tutorial, we’ll show you how to convert a Python string to an integer.