To install the latest version, run:
```console
$ sudo yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
```
If prompted to accept the GPG key, verify that the fingerprint matches
`060A 61C5 1B55 8A7F 742B 77AA C52F EB6B 621E 9F35`, and if so, accept it.
This command installs Docker, but it doesn't start Docker. It also creates a
`docker` group, however, it doesn't add any users to the group by default.
To install a specific version, start by listing the available versions in the repository:
```console
$ yum list docker-ce --showduplicates | sort -r
docker-ce.x86_64 3:18.09.1-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.0-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.1.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.0.ce-3.el7 docker-ce-stable
```
The list returned depends on which repositories are enabled, and is specific
to your version of CentOS (indicated by the `.el7` suffix in this example).
Install a specific version by its fully qualified package name, which is
the package name (`docker-ce`) plus the version string (2nd column)
starting at the first colon (`:`), up to the first hyphen, separated by
a hyphen (`-`). For example, `docker-ce-18.09.1`.
Replace `` with the desired version and then run the following command to install:
```console
$ sudo yum install docker-ce- docker-ce-cli- containerd.io docker-buildx-plugin docker-compose-plugin
```
This command installs Docker, but it doesn't start Docker. It also creates a
`docker` group, however, it doesn't add any users to the group by default.
2. Start Docker.
```console
$ sudo systemctl start docker
```
3. Verify that Docker Engine installation is successful by running the `hello-world`
image.
```console
$ sudo docker run hello-world
```
This command downloads a test image and runs it in a container. When the
container runs, it prints a confirmation message and exits.
You have now successfully installed and started Docker Engine. The docker user group exists but contains no users, which is why you’re required to use sudo to run Docker commands. Continue to [Linux postinstall](linux-postinstall.md) to allow non-privileged users to run Docker commands and for other optional configuration steps.
#### Upgrade Docker Engine
To upgrade Docker Engine, follow the [installation instructions](#install-using-the-repository),
choosing the new version you want to install.
### Install from a package
If you can't use Docker's repository to install Docker, you can download the
`.rpm` file for your release and install it manually. You need to download
a new file each time you want to upgrade Docker Engine.
1. Go to [{{ download-url-base }}/]({{ download-url-base }}/){: target="_blank" rel="noopener" class="_" }
and choose your version of CentOS. Then browse to `x86_64/stable/Packages/`
and download the `.rpm` file for the Docker version you want to install.
2. Install Docker Engine, changing the path below to the path where you downloaded the Docker package.
```console
$ sudo yum install /path/to/package.rpm
```
Docker is installed but not started. The `docker` group is created, but no
users are added to the group.
3. Start Docker.
```console
$ sudo systemctl start docker
```
4. Verify that Docker Engine installation is successful by running the `hello-world`
image.
```console
$ sudo docker run hello-world
```
This command downloads a test image and runs it in a container. When the
container runs, it prints a confirmation message and exits.
You have now successfully installed and started Docker Engine. The docker user group exists but contains no users, which is why you’re required to use sudo to run Docker commands. Continue to [Linux postinstall](linux-postinstall.md) to allow non-privileged users to run Docker commands and for other optional configuration steps.
#### Upgrade Docker Engine
To upgrade Docker Engine, download the newer package file and repeat the
[installation procedure](#install-from-a-package), using `yum -y upgrade`
instead of `yum -y install`, and point to the new file.
{% include install-script.md %}
## Uninstall Docker Engine
1. Uninstall the Docker Engine, CLI, containerd, and Docker Compose packages:
```console
$ sudo yum remove docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin docker-ce-rootless-extras
```
2. Images, containers, volumes, or customized configuration files on your host
are not automatically removed. To delete all images, containers, and
volumes:
```console
$ sudo rm -rf /var/lib/docker
$ sudo rm -rf /var/lib/containerd
```
You must delete any edited configuration files manually.
## Next steps
- Continue to [Post-installation steps for Linux](linux-postinstall.md).
- Review the topics in [Develop with Docker](../../develop/index.md) to learn how to build new applications using Docker.