command: docker container attach
short: Attach to a running container
long: |
  The **docker attach** command allows you to attach to a running container using
  the container's ID or name, either to view its ongoing output or to control it
  interactively.  You can attach to the same contained process multiple times
  simultaneously, screen sharing style, or quickly view the progress of your
  detached process.

  To stop a container, use `CTRL-c`. This key sequence sends `SIGKILL` to the
  container. You can detach from the container (and leave it running) using a
  configurable key sequence. The default sequence is `CTRL-p CTRL-q`. You
  configure the key sequence using the **--detach-keys** option or a configuration
  file. See **config-json(5)** for documentation on using a configuration file.

  It is forbidden to redirect the standard input of a `docker attach` command while
  attaching to a tty-enabled container (i.e.: launched with `-t`).

  # Override the detach sequence

  If you want, you can configure an override the Docker key sequence for detach.
  This is useful if the Docker default sequence conflicts with key sequence you
  use for other applications. There are two ways to define your own detach key
  sequence, as a per-container override or as a configuration property on  your
  entire configuration.

  To override the sequence for an individual container, use the
  `--detach-keys="<sequence>"` flag with the `docker attach` command. The format of
  the `<sequence>` is either a letter [a-Z], or the `ctrl-` combined with any of
  the following:

  * `a-z` (a single lowercase alpha character )
  * `@` (at sign)
  * `[` (left bracket)
  * `\\` (two backward slashes)
  *  `_` (underscore)
  * `^` (caret)

  These `a`, `ctrl-a`, `X`, or `ctrl-\\` values are all examples of valid key
  sequences. To configure a different configuration default key sequence for all
  containers, see **docker(1)**.

  # EXAMPLES

  ## Attaching to a container

  In this example the top command is run inside a container, from an image called
  fedora, in detached mode. The ID from the container is passed into the **docker
  attach** command:

      # ID=$(sudo docker run -d fedora /usr/bin/top -b)
      # sudo docker attach $ID
      top - 02:05:52 up  3:05,  0 users,  load average: 0.01, 0.02, 0.05
      Tasks:   1 total,   1 running,   0 sleeping,   0 stopped,   0 zombie
      Cpu(s):  0.1%!u(MISSING)s,  0.2%!s(MISSING)y,  0.0%!n(MISSING)i, 99.7%!i(MISSING)d,  0.0%!w(MISSING)a,  0.0%!h(MISSING)i,  0.0%!s(MISSING)i,  0.0%!s(MISSING)t
      Mem:    373572k total,   355560k used,    18012k free,    27872k buffers
      Swap:   786428k total,        0k used,   786428k free,   221740k cached

      PID USER      PR  NI  VIRT  RES  SHR S %!C(MISSING)PU %!M(MISSING)EM    TIME+  COMMAND
      1 root      20   0 17200 1116  912 R    0  0.3   0:00.03 top

      top - 02:05:55 up  3:05,  0 users,  load average: 0.01, 0.02, 0.05
      Tasks:   1 total,   1 running,   0 sleeping,   0 stopped,   0 zombie
      Cpu(s):  0.0%!u(MISSING)s,  0.2%!s(MISSING)y,  0.0%!n(MISSING)i, 99.8%!i(MISSING)d,  0.0%!w(MISSING)a,  0.0%!h(MISSING)i,  0.0%!s(MISSING)i,  0.0%!s(MISSING)t
      Mem:    373572k total,   355244k used,    18328k free,    27872k buffers
      Swap:   786428k total,        0k used,   786428k free,   221776k cached

      PID USER      PR  NI  VIRT  RES  SHR S %!C(MISSING)PU %!M(MISSING)EM    TIME+  COMMAND
      1 root      20   0 17208 1144  932 R    0  0.3   0:00.03 top
usage: docker container attach [OPTIONS] CONTAINER
pname: docker container
plink: docker_container.yaml
options:
- option: detach-keys
  description: Override the key sequence for detaching a container
- option: no-stdin
  default_value: "false"
  description: Do not attach STDIN
- option: sig-proxy
  default_value: "true"
  description: Proxy all received signals to the process