Docker CLI

What is the syntax for the --link flag with docker run?

--link <name or id>:alias

Which parameter would allow you to customize a docker container name?

--name $NAME

What does docker's -P flag do?

Maps network ports inside the container to the container host.

How do you delete a docker container immediately after it is stopped?

The --rm flag on docker run

How long will a docker container run?

Until the command used to start it stops.

What command would attach to a running container?

docker attach $TAG

Get help for the docker command attach?

docker attach --help

What is the command to list all docker images?

docker images

What command will generate a JSON list of container settings?

docker inspect $NAME

How do you check the STDOUT of a running daemon container?

docker logs $NAME

How can you determine which local port number has been mapped to a given docker container port number?

docker port $NAME $PORTNUM (i.e. docker port nostalgic_reward 5000). docker ps will also work in list-format.

What command is used to list all running docker containers?

docker ps

What command is used to list all docker containers?

docker ps -a

What command would pull a centos6 image from the Docker image repository?

docker pull centos:centos6

How do you delete a docker container?

docker rm $NAME

What is the command to delete a docker image?

docker rmi $NAME

How would you bind udp port 63 to localhost port 63?

docker run -d -p 127.0.0.1:63:63/udp

How would you bind ports 80 and 443 from a docker container to the docker host?

docker run -d -p 80:80 -p 443:443

How do you start a container in daemonized mode?

docker run -d centos:centos6 /bin/sh

What command would run a new docker container's terminal with centos6?

docker run -t -i centos:centos6 /bin/bash. The -t flag assigns a pseudo tty to the session and the -i flag makes the session interactive by using the standard STDIN of the container.

What command would resume an existing container and run the terminal?

docker start $TAG

How do you stop a running container?

docker stop $NAME

Get docker version information?

docker version

On Fedora, how would you list all the docker images from the file system?

ls -lah /var/lib/docker/containers/