docs/engine/reference/commandline/container_attach.md

datafolder	datafile	title
engine-cli	docker_container_attach	docker container attach

{% include cli.md %}

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