docker-container-attach(1)



DOCKER(1)                                                            DOCKER(1)

NAME
       docker-container-attach - Attach local standard input, output, and
       error streams to a running container

SYNOPSIS
       docker container attach [OPTIONS] CONTAINER

DESCRIPTION
       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:

       o a-z (a single lowercase alpha character )

       o @ (at sign)

       o [ (left bracket)

       o \\ (two backward slashes)

       o _ (underscore)

       o ^ (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%us,  0.2%sy,  0.0%ni, 99.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
              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 %CPU %MEM    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%us,  0.2%sy,  0.0%ni, 99.8%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
              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 %CPU %MEM    TIME+  COMMAND
              1 root      20   0 17208 1144  932 R    0  0.3   0:00.03 top

OPTIONS
       --detach-keys=""
           Override the key sequence for detaching a container

       --no-stdin[=false]
           Do not attach STDIN

       --sig-proxy[=true]
           Proxy all received signals to the process

SEE ALSO
       docker-container(1)

Docker Community                   Sep 2017                          DOCKER(1)

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