github.com/akashshinde/docker@v1.9.1/docs/installation/debian.md (about)

     1  <!--[metadata]>
     2  +++
     3  title = "Installation on Debian"
     4  description = "Instructions for installing Docker on Debian."
     5  keywords = ["Docker, Docker documentation, installation,  debian"]
     6  [menu.main]
     7  parent = "smn_linux"
     8  weight=-2
     9  +++
    10  <![end-metadata]-->
    11  
    12  # Debian
    13  
    14  Docker is supported on the following versions of Debian:
    15  
    16   - [*Debian testing stretch (64-bit)*](#debian-wheezy-stable-7-x-64-bit)
    17   - [*Debian 8.0 Jessie (64-bit)*](#debian-jessie-80-64-bit)
    18   - [*Debian 7.7 Wheezy (64-bit)*](#debian-wheezy-stable-7-x-64-bit)
    19  
    20   >**Note**: If you previously installed Docker using `apt`, make sure you update
    21   your `apt` sources to the new `apt` repository.
    22  
    23  ## Prerequisites
    24  
    25   Docker requires a 64-bit installation regardless of your Debian version.
    26   Additionally, your kernel must be 3.10 at minimum. The latest 3.10 minor
    27   version or a newer maintained version are also acceptable.
    28  
    29   Kernels older than 3.10 lack some of the features required to run Docker
    30   containers. These older versions are known to have bugs which cause data loss
    31   and frequently panic under certain conditions.
    32  
    33   To check your current kernel version, open a terminal and use `uname -r` to
    34   display your kernel version:
    35  
    36       $ uname -r
    37  
    38  ### Update your apt repository
    39  
    40  Docker's `apt` repository contains Docker 1.7.1 and higher. To set `apt` to use
    41  from the new repository:
    42  
    43   1. If you haven't already done so, log into your machine as a user with `sudo` or `root` privileges.
    44  
    45   2. Open a terminal window.
    46  
    47   3. Purge any older repositories.
    48  
    49           $ apt-get purge lxc-docker*
    50           $ apt-get purge docker.io*
    51  
    52   4. Add the new `gpg` key.
    53  
    54           $ apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
    55  
    56   5. Open the `/etc/apt/sources.list.d/docker.list` file in your favorite editor.
    57  
    58       If the file doesn't exist, create it.
    59  
    60   6. Remove any existing entries.
    61  
    62   7. Add an entry for your Debian operating system.
    63  
    64       The possible entries are:
    65  
    66           # Debian Wheezy
    67          deb https://apt.dockerproject.org/repo debian-wheezy main
    68          # Debian Jessie
    69          deb https://apt.dockerproject.org/repo debian-jessie main
    70          # Debian Stretch/Sid
    71          deb https://apt.dockerproject.org/repo debian-stretch main
    72  
    73   8. Save and close the file.
    74  
    75   9. Update the `apt` package index.
    76  
    77           $ apt-get update
    78  
    79   10. Verify that `apt` is pulling from the right repository.
    80  
    81           $ apt-cache policy docker-engine
    82  
    83       From now on when you run `apt-get upgrade`, `apt` pulls from the new apt repository.  
    84  
    85  ## Install Docker
    86  
    87  Before installing Docker, make sure you have set your `apt` repository correctly as described in the prerequisites.
    88  
    89  1. Update the `apt` package index.
    90  
    91          $ sudo apt-get update
    92  
    93  2. Install Docker.
    94  
    95          $ sudo apt-get install docker-engine
    96  
    97  5. Start the `docker` daemon.
    98  
    99          $ sudo service docker start
   100  
   101  6. Verify `docker` is installed correctly.
   102  
   103          $ sudo docker run hello-world
   104  
   105      This command downloads a test image and runs it in a container. When the
   106      container runs, it prints an informational message. Then, it exits.
   107  
   108  
   109  ## Giving non-root access
   110  
   111  The `docker` daemon always runs as the `root` user and the `docker`
   112  daemon binds to a Unix socket instead of a TCP port. By default that
   113  Unix socket is owned by the user `root`, and so, by default, you can
   114  access it with `sudo`.
   115  
   116  If you (or your Docker installer) create a Unix group called `docker`
   117  and add users to it, then the `docker` daemon will make the ownership of
   118  the Unix socket read/writable by the `docker` group when the daemon
   119  starts. The `docker` daemon must always run as the root user, but if you
   120  run the `docker` client as a user in the `docker` group then you don't
   121  need to add `sudo` to all the client commands. From Docker 0.9.0 you can
   122  use the `-G` flag to specify an alternative group.
   123  
   124  > **Warning**:
   125  > The `docker` group (or the group specified with the `-G` flag) is
   126  > `root`-equivalent; see [*Docker Daemon Attack Surface*](../articles/security.md#docker-daemon-attack-surface) details.
   127  
   128  **Example:**
   129  
   130      # Add the docker group if it doesn't already exist.
   131      $ sudo groupadd docker
   132  
   133      # Add the connected user "${USER}" to the docker group.
   134      # Change the user name to match your preferred user.
   135      # You may have to logout and log back in again for
   136      # this to take effect.
   137      $ sudo gpasswd -a ${USER} docker
   138  
   139      # Restart the Docker daemon.
   140      $ sudo service docker restart
   141  
   142  ## Upgrade Docker
   143  
   144  To install the latest version of Docker with `apt-get`:
   145  
   146      $ apt-get upgrade docker-engine
   147  
   148  ## Uninstall
   149  
   150  To uninstall the Docker package:
   151  
   152      $ sudo apt-get purge docker-engine
   153  
   154  To uninstall the Docker package and dependencies that are no longer needed:
   155  
   156      $ sudo apt-get autoremove --purge docker-engine
   157  
   158  The above commands will not remove images, containers, volumes, or user created
   159  configuration files on your host. If you wish to delete all images, containers,
   160  and volumes run the following command:
   161  
   162      $ rm -rf /var/lib/docker
   163  
   164  You must delete the user created configuration files manually.
   165  
   166  ## What next?
   167  
   168  Continue with the [User Guide](../userguide/).