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1. Docker-Installation.md

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Docker Installation on Ubuntu

Install Docker

$ sudo apt-get remove docker docker-engine docker.io
$ sudo apt-get install     apt-transport-https     ca-certificates     curl     software-properties-common

Add docker keys and repo

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo apt-key fingerprint 0EBFCD88
$ sudo add-apt-repository    "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

Get Docker

$ sudo apt-get update
$ apt-cache madison docker-ce
$ sudo apt-get install docker-ce=18.06.1~ce~3-0~ubuntu

Run docker without sudo

$ sudo groupadd docker
$ sudo usermod -aG docker $USER
LOGOUT and LOGIN to session again
$ docker run hello-world

If any error in above steps, make sure you have logged out and logged in to the shell once. If still doesn't work, try restarting docker service using below commonds

$ sudo systemctl stop docker
$ sudo systemctl start docker

Docker compose installation

$ sudo curl -L "https://github.com/docker/compose/releases/download/1.23.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
$ sudo chmod +x /usr/local/bin/docker-compose
$ docker-compose --version