Docker is an open-source software platform that enables developers to create, deploy, and manage virtualized application containers on a common operating system. It packages software into standardized units, along with all its dependencies, ensuring applications run quickly and reliably across different computing environments. Docker containers are lightweight, share the host machine's OS kernel, and provide strong isolation capabilities, making them more efficient and secure compared to traditional virtual machines.
Docker containers offer numerous advantages over traditional virtual machines, such as improved efficiency, speed, and resource utilization.
Containers virtualize the operating system instead of hardware, making them more portable and efficient than VMs. They can coexist with VMs, providing greater flexibility in deploying and managing applications.
When comparing Docker and virtual machines (VMs), it's essential to understand their fundamental differences. Docker containers virtualize the operating system, making them lightweight and efficient. They share the host machine's OS kernel, reducing resource usage and enabling faster deployment times.
In contrast, VMs encapsulate an entire OS along with the application, leading to greater resource consumption and slower startup times.
To effectively use Docker, it's essential to understand its fundamental concepts:
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