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