Docker - Container Cheat Sheet

Basic and advanced docker commands for reference. Use them as a cheat sheet

• Commands to install docker on Linux 

curl -fsSL https://get.docker.com -o get-docker.sh

sudo sh get-docker.sh

• Command to start the Docker daemon 

sudo service --status-all 

sudo service docker start

•  Command to Pull the docker images from Docker hub - https://hub.docker.com/

docker pull image_name:version
version : default  value is latest 

docker pull mysql

• Command to pull and install the docker image

docker run image_name

docker run mysql

            docker run -d image_name   => To run the command in background mode. 

             docker run -d --name webapp_vk  -d image_name  => To assign a name to the docker container

              docker run -d image_name command ==> We will override the CMD statement in the image or append the value to ENTRYPOINT command.  

•  Command to List the running containers. 

                    docker ps      ==> List all the running containers. 

                    docker ps -a  ==> List both running and stopped containers. 

• Command to List the images present on the host. 

                   docker images  ==> List all the images. 

• Command to Stop the containers.

                    docker stop container_id / container_name.   

• Command to Remove the containers. 

                    docker rm container_id  ==> Make sure containers are stopped before running the command. 

• Command to delete or remove the images. 

                   docker rmi image_id   ==> We can specify first few characters of the Id. 

• Command to run and execute Unix command. 

                docker run ubuntu cat /etc/*releases* ==> This will install a ubuntu on a container and run the command. 

• Command to execute the scripts

            docker exec container_id cat /etc/*release*

• Command to build a docker image

        docker build .   ==> provided the Dockerfile is in the same directory from where we are running this command. 

        docker build -f  DockerFile  -t  vijaya/image_name  ==> Providing tag/name to the image

• Command to push the docker image to Hub

        Before we push the image , we need to login 

        docker login  ==>  This will prompt docker hub credentials.  After successful login

        docker push vijaya/image_name  ==> Push the image to Hub

• Command to pass the environment values

        docker run -d -e ENV_VARIABLE_NAME=VALUE  --name vijaya_container  image_name  ==> This will supply the environment values. 

• Command for Port Mapping to access the applications using Docker Host IP. 

            docker run -d -p host_port :  container_port  image_name

            docker run -d -p 8306:3306 mysql 

OPEN SSL Commands

 Command to get the SSL certificate from the server. 

    openssl s_client -showcerts -connect ip:port

Command to import certificate to custom truststore. 

keytool -import -alias alias_name -file certificate.cer -storetype JKS -keystore CustomTrustStore