moby--moby/docs/project/software-required.md

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title = "Get the required software"
description = "Describes the software required to contribute to Docker"
keywords = ["GitHub account, repository, Docker, Git, Go, make, "]
[menu.main]
parent = "smn_develop"
weight=2
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<![end-metadata]-->
# Get the required software for Linux or OS X
This page explains how to get the software you need to use a Linux or OS X
machine for Docker development. Before you begin contributing you must have:
* a GitHub account
* `git`
* `make`
* `docker`
You'll notice that `go`, the language that Docker is written in, is not listed.
That's because you don't need it installed; Docker's development environment
provides it for you. You'll learn more about the development environment later.
### Get a GitHub account
To contribute to the Docker project, you will need a <a
href="https://github.com" target="_blank">GitHub account</a>. A free account is
fine. All the Docker project repositories are public and visible to everyone.
You should also have some experience using both the GitHub application and `git`
on the command line.
### Install git
Install `git` on your local system. You can check if `git` is on already on your
system and properly installed with the following command:
$ git --version
This documentation is written using `git` version 2.2.2. Your version may be
different depending on your OS.
### Install make
Install `make`. You can check if `make` is on your system with the following
command:
$ make -v
This documentation is written using GNU Make 3.81. Your version may be different
depending on your OS.
### Install or upgrade Docker
If you haven't already, install the Docker software using the
<a href="/installation" target="_blank">instructions for your operating system</a>.
If you have an existing installation, check your version and make sure you have
the latest Docker.
To check if `docker` is already installed on Linux:
$ docker --version
Docker version 1.5.0, build a8a31ef
On Mac OS X or Windows, you should have installed Docker Toolbox which includes
Docker. You'll need to verify both Docker Machine and Docker. This
documentation was written on OS X using the following versions.
$ docker-machine --version
docker-machine version 0.3.0 (0a251fe)
$ docker --version
Docker version 1.7.0, build a8a31ef
## Linux users and sudo
This guide assumes you have added your user to the `docker` group on your system.
To check, list the group's contents:
$ getent group docker
docker:x:999:ubuntu
If the command returns no matches, you have two choices. You can preface this
guide's `docker` commands with `sudo` as you work. Alternatively, you can add
your user to the `docker` group as follows:
$ sudo usermod -aG docker ubuntu
You must log out and log back in for this modification to take effect.
## Where to go next
In the next section, you'll [learn how to set up and configure Git for
contributing to Docker](/project/set-up-git/).