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 -i and -t).

EXAMPLES

Attaching to a container

       In this example the top command is run  inside  a  container  from  an  ubuntu  image,  in
       detached mode, then attaches to it, and then terminates the container with CTRL-c:

              $ docker run -d --name topdemo ubuntu:20.04 /usr/bin/top -b
              $ docker attach topdemo
              top - 00:07:01 up  4:54,  0 users,  load average: 0.83, 0.91, 0.82
              Tasks:   1 total,   1 running,   0 sleeping,   0 stopped,   0 zombie
              %Cpu(s):  2.3 us,  1.6 sy,  0.0 ni, 95.9 id,  0.0 wa,  0.1 hi,  0.1 si,  0.0 st
              MiB Mem :  15846.2 total,   5729.2 free,   2592.5 used,   7524.4 buff/cache
              MiB Swap:  16384.0 total,  16384.0 free,      0.0 used.  12097.3 avail Mem

                  PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
                    1 root      20   0    5976   3256   2828 R   0.0   0.0   0:00.04 top
              ^C

Override the detach sequence

       Use  the  --detach-keys  option  to  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=key flag  with
       the  docker  attach  command. The format of the key is either a letter [a-Z], or the ctrl-
       value, where value is one 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).

OPTIONS

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

       -h, --help[=false]      help for attach

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

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

SEE ALSO

       docker-container(1)