How To install Docker in Linux Mint 18.2

source: http://budthapa.pro/blog/show/6/How-To-install-Docker-in-Linux-Mint-18.2



Docker for Linux Mint is availabe as a free Community Edition (CE). Installation is easy and straigh forward. We will install a stable release of docker.
OS Requirements

• Linux Mint 18.2 (LTS)
• Architecture: x86_64

If you've the older version installed already, uninstall it

$ sudo apt-get remove docker docker-engine docker.io

Add repositories

$ sudo apt-get install apt-transport-https ca-certificates curl software-properties-common

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Since, Linux Mint 18.2 (sonya) is based on Ubuntu 16.04 (xenial), we've to use the release codename of Ubuntu 16.04 i.e. xenial. Also, we'll use the latest stable version

$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable"

If you are using Linux Mint 16 (petra), you've to use the release codename "trusty"
To check the release codename of you Linux Mint pc, In your terminal type:

lsb_release -rc

You'll see the release and codename printed in the terminal as

Release: 18.2
Codename: sonya

Now, update the pc

$ sudo apt update

Finally, we'll Install docker community version (CE) in Linux mint 18.2

$ sudo apt install docker-ce

Check if the docker is properly installed by typing

$ docker version

You'll get the output like this:

Client:
 Version:      17.06.2-ce
 API version:  1.30
 Go version:   go1.8.3
 Git commit:   cec0b72
 Built:        Tue Sep  5 20:00:17 2017
 OS/Arch:      linux/amd64

Server:
 Version:      17.06.2-ce
 API version:  1.30 (minimum version 1.12)
 Go version:   go1.8.3
 Git commit:   cec0b72
 Built:        Tue Sep  5 19:59:11 2017
 OS/Arch:      linux/amd64
 Experimental: false

 Running hello world in docker is easy, Just run

$ sudo docker run hello-world

You must be root user to use docker

Running docker command as non root user

If you are a single user and don't want to enter your password everytime while executing docker command, you have to add the current user in docker group.

$ sudo groupadd docker #this is most likely already created while installing docker
$ sudo gpasswd -a $USER docker
$ newgrp docker # you might need to logout if the changes are not working
$ docker run hello-world # check if docker is working without sudo