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The docker update command dynamically updates container configuration. We can use this command to prevent containers from consuming too many resources from their Docker host
eg : docker update –cpu-shares 512 219444e11a87
docker inspect 219444e11a87
We can check the value for CPU share to be 512
docker wait
Start a container in the background.
$ docker run -dit –name=my_container ubuntu bash
Run docker wait, which should block until the container exits.
$ docker wait my_container
In another terminal, stop the first container. The docker wait command above returns the exit code.
$ sudo -s
$ docker stop my_container
This is the same docker wait command from above, but it now exits, returning 0.
$ docker wait my_container
0