5. List of dockerfile instructions and its Brief Summary? by Ramalakshmi
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FROM: specify the valid docker image name, LABEL: metadata infomation to the image, ADD: copy files, directories and remote URL files to the destination, RUN: executes any command, WORKDIR: set the working directory, ENV: set environment variables with key and value, COPY: copy files, directories and remote URL files to the destination, MAINTAINER: author who create the docker image