• Published:

Before you can create a container, you must have an image available locally. That is the basic prerequisite. A CentOS image is used here for demonstration.

1 docker pull centos

Docker pull CentOS image

Create and start a container

The basic command is:

docker run [OPTIONS] IMAGE [COMMAND] [ARG…]

Common docker run options

Some options use a single hyphen, while others use a double hyphen.

  • --name="new container name": assign a custom name to the container
  • -d: run the container in the background and return the container ID; this starts it in detached mode
  • -i: keep the container running in interactive mode, usually used together with -t
  • -t: allocate a pseudo-TTY for the container, usually used together with -i
  • -P: map ports randomly
  • -p: specify port mappings in one of these formats:
  • ip:hostPort:containerPort
  • ip::containerPort
  • hostPort:containerPort
  • containerPort

Start an interactive container

The following command starts a container from centos:latest in interactive mode and runs /bin/bash inside it.

1 docker run -it centos /bin/bash

Start CentOS container interactively

List containers

Use this command to view running containers:

docker ps [OPTIONS]

Common options:

  • -a: show all currently running containers plus containers that ran previously
  • -l: show the most recently created container
  • -n: show the most recently created n containers
  • -q: quiet mode, display only container IDs
  • --no-trunc: do not truncate the output

List Docker containers

Leave a container

There are two common ways to exit:

exit

  • stop the container and exit

ctrl+P+Q

  • exit the container without stopping it

Re-enter a container

To attach to a running container again:

docker attach 名称

1 docker attach edc486762ad2

Attach to a running container

Start or restart a container

Start a stopped container:

1 docker start 容器ID或者容器名

Restart a container:

1 docker restart 容器ID或者容器名

Stop a container

Gracefully stop a running container:

1 docker stop 容器ID或者容器名

Force-stop a container

If a container does not stop normally, you can kill it directly:

1 docker kill 容器ID或者容器名

Remove a stopped container

To delete a container that has already been stopped:

1 docker rm 容器ID

Remove multiple containers at once

Two common ways to delete multiple containers in one command are:

1 docker rm -f $(docker ps -a -q)

1 docker ps -a -q | xargs docker rm

Related Posts