Definition
A container is a standardized unit of software that packages code and all its dependencies, allowing applications to run quickly and reliably from one computing environment to another. It virtualizes the operating system, enabling multiple containers to run on a single OS kernel. Containers are essential for modern software development and deployment, facilitating microservices architectures and CI/CD pipelines. For instance, Docker is a widely used platform for creating, deploying, and running containers. Unlike virtual machines which virtualize hardware, containers virtualize the operating system, making them more lightweight and faster to start. Understanding containers is crucial for cloud computing and DevOps roles, appearing in certifications like AWS Certified Solutions Architect Associate.