cmd docker code example

Example 1: docker command

docker ps # current containers
docker run # create and start the container
docker create # create container
dokcer exec # to run commnads in container for once
docker volume # create a docker volume
docker network # create a docker network
docker rm # remove container 
docker images # list the images
docker rmi # remove image
docker build # build a new image from dockerfile
docker push # push your image to docker repo
docker pull # download an image from docker repo
docker commit # create an image from container

Example 2: CMD or Entrypoint in Docker

FROM ubuntu:trusty
CMD ["/bin/ping","localhost"]

Example 3: CMD or Entrypoint in Docker

$ docker run -d demo
15bfcddb11b5cde0e230246f45ba6eeb1e6f56edb38a91626ab9c478408cb615

$ docker ps -l
CONTAINER ID IMAGE COMMAND CREATED
15bfcddb4312 demo:latest "/bin/sh -c 'ping localhost'" 2 seconds ago

Example 4: dockerfile example

FROM ubuntu:18.04
COPY . /app
RUN make /app
CMD python /app/app.py

Example 5: dockerfile run app cmd

RUN apt-get install python3
CMD echo "Hello world"
ENTRYPOINT echo "Hello world"