It is an open-source project that helps you to automate the deployment of software applications using packaged applications known as containers on top of an Operating System (OS). So, you can also term it “OS-level virtualization.” Each container provides an isolated environment like a Virtual Machine (VM). Unlike VMs, Docker containers do not need a full range of OS capabilities. The host’s kernel is shared and virtualized at the software level.
To sum up, Docker is a tool that allows developers, system administrators, etc., to easily deploy their applications in a sandbox (containers) to run on the host OS, which is Linux. Containers encapsulate everything needed to run an application, from packaging the OS dependencies to your source code. You can easily define a container’s creation steps as instructions in a Dockerfile. Docker uses Dockerfile to define an image.
It is an open-source project that helps you to automate the deployment of software applications using packaged applications known as containers on top of an Operating System (OS). So, you can also term it “OS-level virtualization.” Each container provides an isolated environment like a Virtual Machine (VM). Unlike VMs, Docker containers do not need a full range of OS capabilities. The host’s kernel is shared and virtualized at the software level.
To sum up, Docker is a tool that allows developers, system administrators, etc., to easily deploy their applications in a sandbox (containers) to run on the host OS, which is Linux. Containers encapsulate everything needed to run an application, from packaging the OS dependencies to your source code. You can easily define a container’s creation steps as instructions in a Dockerfile. Docker uses Dockerfile to define an image.