Installation of Docker is pretty straightforward. In this article we will be focusing on Linux installation for docker. Do check below links for docker installation in other OS
-Install Docker on Raspbian (Raspberry PI)
Alternatively, for Linux/Raspberry Pi just run this command and you are good to go
curl -sSL https://get.docker.com | sh
Follow the below instructions to install docker on linux machine [OPTIONAL]
1. Add GPG keys for official docker repo
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
2. Add docker repo to apt sources
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
3. Update package database
sudo apt-get update
4. Install Docker
sudo apt-get install -y docker-ce
Moreover you can check the full installation HERE
Basic Commands to check Docker Installation
Check weather docker is installed and running (to quit CTRL+C)
sudo systemctl status docker
List Docker (list of docker commands, also management command-since docker 2017)
sudo docker
Docker Version (returns the version of client and server (engine/daemon/service)
sudo docker version
Docker Info (returns details about our configuration and setup for our engine)
sudo docker info
Docker Daemon Start/Stop
Docker has 2 components :
1. Docker Daemon (Engine) : This is the core of Docker which runs in the background
2. Docker CLI (Client) : Docker component with which user interacts
Both these components communicate with each other using REST API’s on Port number – 2376
START Docker Daemon
sudo service docker start
STOP Docker Daemon
sudo service docker stop
Running a Container
Before running a Container we need to have a Docker Image (as container is a runtime instance of docker image), we can not run a container without having a Docker Image , cause that will not make any sense.
So here are some Commands for for Docker Images –
View Docker Images present on our computer
sudo docker images
sudo docker images ls
View details of Docker Image present
sudo docker inspect ImageID
Delete Docker image from System
sudo docker rmi ImageID
So now that we know about docker images lets see how to run them, and no worries if you don’t have any image in you system (we have that covered)
Docker RUN command
Here is the most important docker command which is used to Run Images and if that image is not present locally on you system then docker run will download it from dockerhub and run it
sudo docker run -it Image
We can attach additional parameter as -d (for detach mode) , -p (to map port of docker and host)
To give it a try, run ubuntu image (if its not present locally, which i guess not, then it will download and run that command)
sudo docker run centos –it /bin/bash
This command will download the centOS image from docker hub and start an interactive session at /bin/bash
Alternatively, if you want only to pull image and not run it, you can use the below command. Also this command can also be used when your local system has a outdated image and you want to update you local copy with updated copy.
sudo docker pull centos
Thats all for this session, in next tutorial we will explore more into containers.