Docker commands

Docker commands
Running containers
docker ps

All containers
docker ps -a

Pull the image
docker pull [image-name]:[tag/version]

Shows the images
docker images

inspect the image
docker inspect [image-id]

create the container out of image
docker create [image-id]

start the container created
docker start [container-id]

instead of pull the image, create the container and start the container you can directly
docker run [image-name]:[tag/version]
docker run = pull + create + start
options:
-d = detach mode
-P = assigns a random host port to container port

-p = you can choose the host port
hostport:container-port

docker run -d -p 8080:80 nginx
curl http://[IP-Address]:[host-port]


Enter the terminal of running container
docker exec -it [container-id] bash

Just execute the command no need to enter inside container.
docker exec [container-id] command

remove the container
docker rm [container-id]
-f = force
remove all containers
docker rm -f `docker ps -a -q`

environment variables
docker run -d -e key=value [container-id]
to check docker exec [container-id] env

docker volumes
by default docker removes the data when you remove the container, but you can create any folder in the host machine and map it to docker container using -v.

Now even you remove the container, data will not be removed you can attach it to another container again.
mkdir mysql-data
docker run -d -v ~/mysql-data:/var/lib/mysql mysql