page_title: Installation on Red Hat Enterprise Linux
page_description: Installation instructions for Docker on Red Hat Enterprise Linux.
page_keywords: Docker, Docker documentation, requirements, linux, rhel, centos

# Red Hat Enterprise Linux 7

**Red Hat Enterprise Linux 7** has [shipped with
Docker](https://access.redhat.com/site/products/red-hat-enterprise-linux/docker-and-containers).
An overview and some guidance can be found in the [Release
Notes](https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.0_Release_Notes/chap-Red_Hat_Enterprise_Linux-7.0_Release_Notes-Linux_Containers_with_Docker_Format.html).

Docker is located in the *extras* channel. To install Docker:

1. Enable the *extras* channel:

        $ sudo subscription-manager repos --enable=rhel-7-server-extras-rpms

2. Install Docker:

        $ sudo yum install docker 

Additional installation, configuration, and usage information,
including a [Get Started with Docker Containers in Red Hat
Enterprise Linux 7](https://access.redhat.com/site/articles/881893)
guide, can be found by Red Hat customers on the [Red Hat Customer
Portal](https://access.redhat.com/).

# Red Hat Enterprise Linux 6

Docker is available for **RHEL** on EPEL. Please note that
this package is part of [Extra Packages for Enterprise Linux
(EPEL)](https://fedoraproject.org/wiki/EPEL), a community effort to
create and maintain additional packages for the RHEL distribution.

Also note that due to the current Docker limitations, Docker is able to
run only on the **64 bit** architecture.

You will need [RHEL
6.5](https://access.redhat.com/site/articles/3078#RHEL6) or higher, with
a RHEL 6 kernel version 2.6.32-431 or higher as this has specific kernel
fixes to allow Docker to work.

## Kernel support

RHEL will only support Docker via the *extras* channel or EPEL package when
running on kernels shipped by the distribution. There are things like namespace
changes which will cause issues if one decides to step outside that box and run
non-distro kernel packages.

## Installation

Firstly, you need to install the EPEL repository. Please follow the
[EPEL installation
instructions](https://fedoraproject.org/wiki/EPEL#How_can_I_use_these_extra_packages.3F).

The `docker-io` package provides Docker on EPEL.

If you already have the (unrelated) `docker` package
installed, it will conflict with `docker-io`.
There's a [bug report](
https://bugzilla.redhat.com/show_bug.cgi?id=1043676) filed for it.
To proceed with `docker-io` installation, please remove `docker` first.

Next, let's install the `docker-io` package which
will install Docker on our host.

    $ sudo yum -y install docker-io

To update the `docker-io` package

    $ sudo yum -y update docker-io

Now that it's installed, let's start the Docker daemon.

    $ sudo service docker start

If we want Docker to start at boot, we should also:

    $ sudo chkconfig docker on

Now let's verify that Docker is working.

    $ sudo docker run -i -t fedora /bin/bash

> Note: If you get a `Cannot start container` error mentioning SELinux
> or permission denied, you may need to update the SELinux policies.
> This can be done using `sudo yum upgrade selinux-policy` and then rebooting.

**Done!**

Continue with the [User Guide](/userguide/).

## Custom daemon options

If you need to add an HTTP Proxy, set a different directory or partition for the
Docker runtime files, or make other customizations, read our systemd article to
learn how to [customize your systemd Docker daemon options](/articles/systemd/).


## Issues?

If you have any issues - please report them directly in the
[Red Hat Bugzilla for docker-io component](
https://bugzilla.redhat.com/enter_bug.cgi?product=Fedora%20EPEL&component=docker-io).