% DOCKER(1) Docker User Manuals % Docker Community % JUNE 2014 # NAME docker-attach - Attach to a running container # SYNOPSIS **docker attach** [**--help**]/ [**--no-stdin**[=*false*]] [**--sig-proxy**[=*true*]] CONTAINER # DESCRIPTION If you **docker run** a container in detached mode (**-d**), you can reattach to the detached container with **docker attach** using the container's ID or name. You can detach from the container again (and leave it running) with `CTRL-p CTRL-q` (for a quiet exit), or `CTRL-c` which will send a SIGKILL to the container, or `CTRL-\` to get a stacktrace of the Docker client when it quits. When you detach from a container the exit code will be returned to the client. 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`). # OPTIONS **--help** Print usage statement **--no-stdin**=*true*|*false* Do not attach STDIN. The default is *false*. **--sig-proxy**=*true*|*false* Proxy all received signals to the process (non-TTY mode only). SIGCHLD, SIGKILL, and SIGSTOP are not proxied. The default is *true*. # 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 # HISTORY April 2014, Originally compiled by William Henry (whenry at redhat dot com) based on docker.com source material and internal work. June 2014, updated by Sven Dowideit