Glossary

What is a Control Panel? — step-by-step DevOps tutorial on Progressive Robot

What is a Control Panel?

A control panel is a graphical interface that allows users to manage settings and features. They are often found in the context of native apps on desktop or mobile operating systems, where they can be used to configure applications and the operating system itself, or on the web, where they most…

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What is the DOM? — step-by-step DevOps tutorial on Progressive Robot

What is the DOM?

The Document Object Model, usually shortened to *the DOM*, is a cross-platform, language-independent application programming interface for HTML and XML documents.

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What is Docker? — step-by-step Docker tutorial on Progressive Robot

What is Docker?

Docker is a popular open source containerization tool used to provide a portable and consistent runtime environment for software applications, while consuming less resources than a traditional server or virtual machine. Docker uses containers, isolated user-space environments that run at the operating system level and share system resources such as the kernel and the filesystem.

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What is Free Software? — step-by-step DevOps tutorial on Progressive Robot

What is Free Software?

Free software is any program released with a license approved by the Free Software Foundation that allows users to view, modify, and share source code.

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What Is a Hypervisor? — step-by-step DevOps tutorial on Progressive Robot

What Is a Hypervisor?

A hypervisor is software that creates, runs, and monitors virtual machines. The hypervisor shares the host’s resources — such as CPU, memory and storage — among various guest VMs. A hypervisor provides the flexibility to run virtual machines that use operating systems different from the one run by the host machine.

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What Is REPL? — step-by-step DevOps tutorial on Progressive Robot

What Is REPL?

A Read-Eval-Print Loop, or REPL, is a computer environment where user inputs are read and evaluated, and then the results are returned to the user. REPLs provide an interactive environment to explore tools available in specific environments or programming languages. Some examples include the Node.js console, IPython, the Bash shell, and the developer console found in most web browsers.

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What is Ansible? — step-by-step Devops tutorial on Progressive Robot

What is Ansible?

Ansible is an open source configuration management tool that provides a minimalist server automation framework based on YAML definitions. Its simplified infrastructure requirements and accessible syntax helped make Ansible one of the most popular configuration management tools to date.

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What is Debugging? — step-by-step DevOps tutorial on Progressive Robot

What is Debugging?

In computing, debugging is the process of looking for and then resolving issues that prevent software from running correctly. Software bugs refer to an error or fault in the codebase that leads to an unexpected result, or unintended outcomes. Because of this naming convention, the process…

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What Is a Kernel? — step-by-step DevOps tutorial on Progressive Robot

What Is a Kernel?

The kernel is a core component of an operating system and serves as the main interface between the computer’s physical hardware and the processes running on it. The kernel enables multiple applications to share hardware resources by providing access to CPU, memory, disk I/O, and networking.

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