b36522b473
use current LTS versions of ubuntu where suitable, remove uses of ubuntu:23.10 (which reache EOL), and and update some other examples to use more current versions. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2.4 KiB
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 alpine top -b
$ docker attach topdemo
Mem: 2395856K used, 5638884K free, 2328K shrd, 61904K buff, 1524264K cached
CPU: 0% usr 0% sys 0% nic 99% idle 0% io 0% irq 0% sirq
Load average: 0.15 0.06 0.01 1/567 6
PID PPID USER STAT VSZ %VSZ CPU %CPU COMMAND
1 0 root R 1700 0% 3 0% top -b
^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).