2015-06-08 13:48:20 -04:00
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% DOCKER(1) Docker User Manuals
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% Docker Community
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% JUNE 2014
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# NAME
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docker-attach - Attach to a running container
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# SYNOPSIS
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**docker attach**
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2015-10-13 11:12:30 -04:00
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[**--help**]
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2015-06-08 13:48:20 -04:00
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[**--no-stdin**[=*false*]]
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[**--sig-proxy**[=*true*]]
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CONTAINER
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# DESCRIPTION
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The **docker attach** command allows you to attach to a running container using
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the container's ID or name, either to view its ongoing output or to control it
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interactively. You can attach to the same contained process multiple times
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simultaneously, screen sharing style, or quickly view the progress of your
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daemonized process.
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You can detach from the container (and leave it running) with `CTRL-p CTRL-q`
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(for a quiet exit) or `CTRL-c` which will send a `SIGKILL` to the container.
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When you are attached to a container, and exit its main process, the process's
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exit code will be returned to the client.
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It is forbidden to redirect the standard input of a `docker attach` command while
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attaching to a tty-enabled container (i.e.: launched with `-t`).
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# OPTIONS
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**--help**
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Print usage statement
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**--no-stdin**=*true*|*false*
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Do not attach STDIN. The default is *false*.
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**--sig-proxy**=*true*|*false*
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Proxy all received signals to the process (non-TTY mode only). SIGCHLD, SIGKILL, and SIGSTOP are not proxied. The default is *true*.
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# EXAMPLES
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## Attaching to a container
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In this example the top command is run inside a container, from an image called
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fedora, in detached mode. The ID from the container is passed into the **docker
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attach** command:
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# ID=$(sudo docker run -d fedora /usr/bin/top -b)
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# sudo docker attach $ID
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top - 02:05:52 up 3:05, 0 users, load average: 0.01, 0.02, 0.05
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Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
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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
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Mem: 373572k total, 355560k used, 18012k free, 27872k buffers
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Swap: 786428k total, 0k used, 786428k free, 221740k cached
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PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
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1 root 20 0 17200 1116 912 R 0 0.3 0:00.03 top
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top - 02:05:55 up 3:05, 0 users, load average: 0.01, 0.02, 0.05
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Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
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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
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Mem: 373572k total, 355244k used, 18328k free, 27872k buffers
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Swap: 786428k total, 0k used, 786428k free, 221776k cached
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PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
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1 root 20 0 17208 1144 932 R 0 0.3 0:00.03 top
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# HISTORY
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April 2014, Originally compiled by William Henry (whenry at redhat dot com)
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based on docker.com source material and internal work.
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June 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
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