# Commands

## Clone a docker container

* `docker pull <image>:latest`. The tag `latest` is not required. Clone the container appropriate for your use case, for eg., use `centos` for the latest version of CentOS. CentOS and most other linux operating systems are available as official repositories from the [Docker Hub](https://hub.docker.com).
* To use non-official docker images, you need to add the organisation before the docker image, for example to pull the latest version of `tensorflow`: `docker pull tensorflow/tensorflow:latest`

## Using a docker image

* The docker image can be used directly from the Docker Hub
* To launch the `centos`  docker container, run `docker run -ti tensorflow/tensorflow:latest /bin/bash`

## Running a container with a local volume mounted

* `docker run -ti -v /home/<user>/<mounted-folder>/:/<path-in-container> cbgeo/cb-geo:latest`

## Connecting to a running container

* `docker exec -ti <containerid> /bin/bash`

## Start / stop a container

* `docker start <containerid>`
* `docker stop <containerid>`

## Delete a container

* `docker rm <containerid>`, stop the container before deleting it.&#x20;
* To delete all docker containers `docker rm $(docker ps -a -q)`

## Exposing ports

* To connect to a particular port (for e.g., 3000) in docker container to port `3000` in localhost:

  &#x20; `docker run -ti -p 3000:3000 tensorflow/tensorflow`

## To login as root

* Launching docker as root user: `docker exec -u 0 -ti <containerid> /bin/bash`

## Creating an image from a docker file

* To build an image from docker file run as root `docker build -t "tensorflow/tensorflow" /path/to/Dockerfile`
* `docker history` will show you the effect of each command has on the overall size of the file.

![Docker cheat sheet](https://3073326825-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-L9PtzjOz4HPAc9i-Kmp%2F-L9Pu2krKYi6YW2a--1m%2F-L9Pu60N2vS-4bHT_Pz_%2Fdocker-cheat-sheet.png?generation=1523017355549590\&alt=media)


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