Basic Docker Commands along with the information about Docker

 In previous blog we have discussed about Docker and the image of it. Today we are going to cover  basic list of Docker commands with some basic information of it like why you need to use Docker? How do you use Docker? etc....

Docker:

'A unique and smart way to build apps’, as stated on its website, is an open-source platform for building apps and micro-services. The catch here is the automated deployment of your app in a container, by OS level virtualization provided by Dockers. Dockers are better than VMs as you can do away with the additional costs for maintaining and starting the latter. By deploying your app and its dependencies (i.e. the per-requisite apps for its proper functioning) in a container, your app becomes portable during all the phases of development and testing. Moreover, the isolated apps eliminate conflicts, enable team collaboration, and reduce the time-to-market.

When Do You Need to Use a Docker?


For Docker CI/CD during numerous development phases (dev/test/QA)

For replicating the environment on your server, while running your code locally on your laptop

For distributing your app’s OS with a team, and as a version control system.

How Do You Setup a Docker Locally


Download a Docker edition and the Docker Toolbox

Make sure your BIOS has Virtualization Technologies, AMD-V, or KVM enabled

Install the Extension Pack in the Oracle Virtual Box.

Run the Setup

How Do You Use a Docker?

The biggest advantage of VMs is that they create snapshots which can be revisited instantly later. Docker containers further enhance the lightweight process virtualization by being OS independent and using the Linux Kernel’s functionality. They are created from Docker images – like snapshots. Docker images are created using a Docker file which can be customized or used as is. The default execution driver for creating a docker container is ‘libcontainer’. Docker Hub can be used for searching docker images and seeing the way they have been built.


To create a Docker container, download the ‘hello world’ image, by typing the following command in the terminal –


$ docker run hello world


For checking the number of images on your system, use the following command –
$ docker images


For searching an image in the Docker Hub –
$ docker search <image>


List of Docker Basic Commands

docker run – Runs a command in a new container.

docker start – Starts one or more stopped containers

docker stop – Stops one or more running containers

docker build – Builds an image form a Docker file

docker pull – Pulls an image or a repository from a registry

docker push – Pushes an image or a repository to a registry

docker export – Exports a container’s filesystem as a tar archive

docker exec – Runs a command in a run-time container

docker search – Searches the Docker Hub for images

docker attach – Attaches to a running container

docker commit – Creates a new image from a container’s changes
Check out the complete list of commands in the Docker documentation.