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.TH "DOCKER" "1" "APRIL 2014" "0.1" "Docker"
.SH NAME
docker-attach \- Attach to a running container
.SH SYNOPSIS
.B docker attach
\fB--no-stdin\fR[=\fIfalse\fR] 
\fB--sig-proxy\fR[=\fItrue\fR] 
container
.SH DESCRIPTION
If you \fBdocker run\fR a container in detached mode (\fB-d\fR), you can reattach to the detached container with \fBdocker attach\fR using the container's ID or name.
.sp
You can detach from the container again (and leave it running) with CTRL-c (for a quiet exit) or CTRL-\ to get a stacktrace of the Docker client when it quits. When you detach from the container the exit code will be returned to the client.
.SH "OPTIONS"
.TP
.B --no-stdin=\fItrue\fR|\fIfalse\fR
When set to true, do not attach to stdin. The default is \fIfalse\fR.
.TP
.B --sig-proxy=\fItrue\fR|\fIfalse\fR
When set to true, proxify all received signal to the process (even in non-tty mode). The default is \fItrue\fR.
.sp
.SH EXAMPLES
.sp
.PP
.B Attaching to a container
.TP
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 \fBdocker attach\fR command:
.sp
.nf
.RS
# 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
.RE
.fi
.sp
.SH HISTORY
April 2014, Originally compiled by William Henry (whenry at redhat dot com) based on dockier.io source material and internal work.