Docker Introduction
It is a command line program that simplifies installing , running and publishing software.It is done by unix technology called container.Softwares are run with inside container.Docker package , ship and run software.It is not programming language. it is tool that helps to install, upgrade , remove and manage software.It uses Linux container technology.It is like software virtualization.
As per given diagram we can understand where docker exist in our system


In docker mainly two program runs
  • Daemon : Its background process
  • Docker CLI : To this user interacts if he need to install , start ,stop, publish any software.
Every container runs as a child process and runs in its own memory.



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