Basic Commands

To download/pull the images from the dockerhub(public repo):

docker pull <image-name>

Example:

docker pull ubuntu

docker pull jenkins

To run the docker container from the image:

docker run [options] <image name> <command to execute>

Example1:

Run ubuntu docker image, and execute "ls -l"

sudo docker run ubuntu ls -l

After execution, this container will be in stopped state. It has to be manually cleaned

Example2:

Automatically remove the container when its stopped using "--rm flag"

docker run --rm ubuntu ls -l

Example3:

Running containers as background process (-d)

sudo docker run -d ubuntu

Example4:

Running interactive command in docker (-i interactive, -t emulates text terminal)

docker run --rm -i -t ubuntu bash

Operational Commands:

To see the list of contrainers and status:

docker ps -a

Note: stopped container, running container all will be listed.

To Stop the Running container:

docker kill <id>

docker kill 522d8f21253c

To Remove the docker container:

docker rm <container-id>

docker rm 06711c8bc905

To check the logs of the docker:

docker logs   <dockerid>

To attach to the docker:

docker attach <docker id>

To detach from the attached docker:

press CTRL + P + Q

To show the stats of the docker:

docker stats <docker id>

To know the Docker Config details(image,id, ip etc):

docker inspect <docker id>

To enabled the port fowarding

-p <localport:remoteport>

sudo docker run -d -p 80:80 ubuntu

Images:

To list the docker images :

This command lists the image available in your system.

docker images

To remove the docker image:

docker rmi <image id>

docker rmi da5939581ac8

To pull the image from the docker hub:

docker pull <image name>

docker pull ubuntu

To show the history of the images:

docker history <imageid>

Note : history means changes done in the image.

Build the Docker image from Docker file:

First you need to move to the working dir (where you have the relavent files for build the dockerimage)

docker build -t <repo:tag> -f <path to the Docker file> .

cd sms/
sudo docker build -t suresh/sms:v1 -f Dockerfile  .

cloud@mkube:~/sms$ sudo docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
suresh/sms          v1                  b8493cb930f7        52 seconds ago      357MB