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Dockerfile run command
Dockerfile run command. FROM ubuntu:12. /script. 10 ---> b750fe79269d Step 2 : RUN mkdir Feb 9, 2016 · That is what RUN is for. sh; install. Before launch. The docker run command can be used with many options making the container customizable with robust features. Is there any step that I can add in Dockerfile which copy from Host to Container. RUN command_1 && export FOO=bar && command_2 and was wondering if setting the variable with RUN export vs ENV was equivalent. FROM centos:centos7 ARG BUILD_TOOL COPY setup. Dec 31, 2022 · If you don't want to use multiple COPY commands, you can use one COPY to copy all files from your host to your container, then use the RUN command to move them to the proper location. if the list of files to copy is very long. As an example, the following Dockerfile would produce a ready-to-run Python application: Jun 19, 2023 · When learning the concepts of Dockerfile, I notice that to install any dependency and bundle it with the application, people generally use the "RUN" instruction. ; Administrative privileges. tar -C /path/to/extract is a work around to this issue. The USER instruction sets the user name or UID to use when running the image and for any RUN, CMD and ENTRYPOINT instructions that follow it in the Dockerfile. 12' If you are afraid of that long command line, put those commands into a shell script and call the script with RUN: script. ENTRYPOINT <command> <argument> Feb 14, 2019 · The command '/bin/bash -c cd test; . On Linux or Mac, you can add this to your ~/. txt /code/ WORKDIR /code EXPOSE 8080 CMD ["python","main_file. This is a dirty hack, not a solution. sh looks like this: service supervisor start service nginx start And I start it inside of my Dockerfile as follows: Dockerfile. Once we type this command For more information about RUN, see Dockerfile reference for the RUN instruction. Docker isn't the only tool you have. One of the scripts that I need to run in a RUN command wants the user to click through and read their license agreement. Aug 19, 2023 · The RUN instruction is commonly used for installing software packages or performing actions during image creation. Make sure to replace image_name with what you would like to name your image. Mar 12, 2017 · Dockerfile: As usual, but depending on the number of commands we need to run we might have an install. See this for more information. If the user does not provide command-line arguments for docker run, the container runs the process specified by the CMD command. RUN instruction has two forms, where RUN <command> is called the shell form and RUN ["executable", "param1", "param2"] is called the exec form. E. May 14, 2021 · as noted by @SoftwareEngineer, when used for logging or tooling purposes you should append the echo command to the one you want to check if were successful. CMD <command> <argument> CMD ["<command>","<argument>"] Defines the default executable for the Docker image. inside the Dockerfile you can add RUN ls to your Dockerfile in which ls stand for list, it should be like this: I'm trying to set environment variables in docker container during the build but without success. Setting them when using run command works but I need to set them during the build. c file. It was originally a ksh93 feature but it is now available in bash, zsh, mksh, FreeBSD sh and in busybox's ash (but only when it is compiled with ENABLE_ASH_BASH_COMPAT). py"] In the Command line: i usally do: docker run -it -p 8080:8080 my_image_name and then docker will start and listen. I've created a little helper command for building and running, in a single command. , set -eux; some command; some other command;). docker run -p 9000:9000 -d me/app and running it in prod you would pass the parameters to the run command. RUN apt-get install -y whatever && echo "installed Feb 26, 2024 · Build and run Dockerfile with one command. Apr 24, 2018 · RUN useradd -ms /bin/bash vault Below command will not create user . FROM busybox RUN echo This is the A > a &&\ echo This is the B > b &&\ echo This is the C > c Sep 22, 2015 · RUN bash -c 'nvm install 0. Jan 1, 2016 · RUN and ENTRYPOINT are two different ways to execute a script. log The following Dockerfile : FROM ubuntu:12. 0 WORKDIR /output # here we can store result of any command # or even store multiple variables in a same file RUN echo "2 + 3" >> /output/temp_file # will print 5, almost anything can be retrieved from a # text file in bash and be used in following commands RUN echo $(( $(cat /output/temp_file) )) CMD tail -f /dev/null Mar 20, 2023 · These instructions include identification of an existing image to be used as a base, commands to be run during the image creation process, and a command that will run when new instances of the container image are deployed. txt in my host machine. Docker's behavior is to give you an exit code to indicate the failure: $ cat df. Docker build is the Docker engine command that consumes a Dockerfile and triggers the image creation process. py *. The . A Dockerfile is a text document that contains a list of commands to build containers, Docker images and determines how a Docker image is created. sh /setup. Mar 18, 2016 · Download Dockerfile and Build a Docker Image. Docker installed. Like so: docker run -P your_app Apr 4, 2020 · (-t is for tag) Docker will run through each of your RUN steps, and stop when it gets to a command that does not exit properly. Sep 3, 2015 · You can use different approaches (e. You should also remove the following lines: Jan 10, 2019 · In case you want to run many commands at entrypoint, the best idea is to create a bash file. As Diyoda pointed out, make sure that the FROM image supplies java. If your script is being run by the sh shell, but you want bash, the proper solution is either to have the sh process invoke bash as a one-off, e. Jul 11, 2024 · Prerequisites. 7. txt c:\. See full list on baeldung. Using git archive --output to a tar file, and then tar -xf /path/to/file. 3. Running docker run -dit myimage Sep 23, 2015 · For example, if your docker run command had -p 80:8080, it's exposing port 8080 on the container and publishing port 80 on the host. 2' services: echoer: image: ubuntu:latest command: echo -e '\ttest1';echo test2; Jun 16, 2017 · In your command I don't see where is the context. FROM python-flask ADD *. You can't run Docker commands from a Dockerfile (and shouldn't as a general rule try to run Docker commands from within Docker containers) but you can write an ordinary shell script on the host that runs the docker build && docker run. Multiple RUN instructions are often used in a Dockerfile. – German Dec 6, 2019 · docker-build-and-run. 12 and make it executable: chmod +x script. This includes invalidating the cache for RUN instructions. 1 executes multiple RUN:. sh && catalina. Because apt-get installs packages, the RUN apt-get command has several counter-intuitive behaviors to look out for. Jun 17, 2024 · Since the default command of this image is sh, it is run, it does not give back any output and it is closed, as we can see if we execute a docker ps -a There are modifiers to keep the container running with the sh command but we will see that later. For example, use the following command to run bash or cmd. This Compose file defines two services: web and redis. For example, run another configuration, build the necessary artifacts, run some external tool or a web browser, and so on. Jul 21, 2015 · Here is a simple workaround: COPY foo file-which-may-exist* /target Make sure foo exists, since COPY needs at least one valid source. If that's your goal, you need to run these in two separate containers. COPY <src> <dest> Jan 20, 2020 · I understand that each RUN command creates a layer. Solution. txt I wish to run all the command in one run command. Let’s create a pretty simple docker-compose. fail FROM busybox RUN exit 1 RUN echo still running $ docker build -f df. CMD - CMD instruction allows you to set a default command, which will be executed only when you run container without specifying a command. please Refer Dockerfile User Documentation. Jul 30, 2021 · So, we can squish this into a single RUN command: RUN apt-get update && \ apt-get upgrade -y && \ apt-get install -y And that’s what most Dockerfiles do today, from the official docker images down to the messy ones I’ve written for myself. My Dockerfile file is simply ; FROM php:fpm WORKDIR /var/www/html VOLUME . Example: ENTRYPOINT "bin/startup. You are correct to define the EVN user in the docker file. For example, to install js libraries. In this specific example, your intuition is correct - the series of commands there extracts files to specific locations. Command line access. Use console output in Dockerfile. sh RUN rm /setup. I had the same issue for dockerfile and multi-arch building. sh run" This will run your startup script and then start your tomcat server, and it won't exit the container. so, it means we can pass the desired command line parameters through _JAVA_OPTIONS without changing anything on Dockerfile as well as to allow it to be able to start as parent process of container for the valid docker Instead you can add the following commands to the Dockerfile (haven't ran this, errors may occur): RUN mkdir -p /var/www/html/ && chown www-data /var/www/html/maps && chgrp www-data /var/www/html/maps or if you don't care about running them in a single layer, you can break them in separate RUN statements. for example when downloading packages and wanting to get a print statement when finished: example from nginx official image dockerfile. Specify a list of tasks to perform before starting the run configuration. 2. bashrc Oct 11, 2018 · I cannot create a directory with the mkdir command in a container with dockerfile. sh #!/bin/bash nvm install 0. Click or press Alt+Insert to add one of the available tasks. May 15, 2018 · Recommended base image. Both can be used to parameterize the build. On continution of this article, we will dive on discussing the creation of container with docker run command effectively with cover all the possible options. Example 1: FROM ubuntu:latest MAINTAINER [email protected] RUN apt-get update RUN apt-get install -y apache2. After this change, the COPY command will have to run again in order for those changes to appear in the image. To print the current workdir and then build the image using the command: docker compose build --no-cache <name of service> 2>&1 | tee build. Feb 7, 2019 · There are a few options, depending on your exact use case: 1. exe. CMD is the command the container executes by default when you launch the built image. Jul 25, 2018 · Use only one 'RUN' statement. Put the CMD ["npm", "serve"] line at the end of the first (Angular-only) Dockerfile. Dockerfile FROM ubuntu:latest ARG TEST_ENV=something Command I'm using to build docker build -t --build-arg TEST_ENV="test" myimage . docker build -t phpx . May 26, 2016 · RUN is an image build step, the state of the container after a RUN command will be committed to the container image. Image references. bash_profile to make it available in the Terminal. Build arguments. sh(shell script) file inside Dockerfile. One common use case for RUN instructions in Debian-based images is to install software using apt-get. sh In Dockerfile put: Apr 5, 2024 · RUN <command> Specifies the commands running inside a container at build time. Nov 13, 2018 · Dockerfile: How to run a linux command and save its output in variable. yaml file: version: '2. It works fine, images are small and fast to build… but it does look a bit ugly. FROM ENTRYPOINT [ "node", "server. If this file exists, the files and directories that match patterns in the files are removed from the build context before it's sent to the builder. How can I copy it to this container. RUN apt-get install python. It has nothing to do with the docker group mentioned above, nor with the user you use to run docker commands. Jul 2, 2015 · If the curl command has not been installed (and is not present in the base image) the entire RUN command fails. That’s why it is always recommended chaining all the RUN commands together. RUN bash -c 'mkdir -p /yourpath/{dir1,dir2,dir3/dir1}' Feb 5, 2020 · It looks like you might be trying to run both Nginx and the Angular development server in Docker. Find reference documentation for the Docker platform’s various APIs, CLIs, and file formats Jun 13, 2016 · I add the line to my dockerfile: RUN pwd. ssh echo "Something" cd tmp ls Jan 1, 2024 · Copy the above shell script inside the dockerfile and run the below command which builds the image based on the argument specified. USER vault WORKDIR /usr/local/bin/vault it will use vault user. 12 && nvm alias default 0. and I wrote to create a directory called foo. When applying the shell form, you run commands in the default /bin/sh -c shell for Linux and ["cmd", "/S", "/C"] for Windows. Jan 6, 2020 · I am trying to create a shell script for setting up a docker container. . RUN command in executable form is: RUN ["apt-get", "install", "firefox"] RUN command in shell form is : RUN apt-get -y install Using this approach, your Dockerfile will look something like. – Oct 30, 2015 · You can use what is called "ANSI-C quoting" with $''. If you need more than 2 options for a variable (or argument) you should use another strategy. Jun 1, 2020 · To list all of files and directories in side docker you can use DOCKER_BUILDKIT=0 command in front of the command to build the docker. From the docs: The RUN instruction will execute any commands in a new layer on top of the current image and commit the results. Backslash escaping end of lines treats this like this: COPY __BUILD_NUMBER \ README. /test Feb 2, 2016 · I have a few RUN commands in my Dockerfile that I would like to run with -no-cache each time I build a Docker image. Now to use gunicorn: I tried to modify my CMD parameter in the dockerfile to Mar 30, 2022 · It executes any commands on top of the current image and creates a new layer by committing the results. If this is possible, which changes should I apply to my Dockerfile? Basically, I'm setting up a web-server and a few daemons inside a Docker container. In a clean setup, you can only execute RUN commands for your system architecture. 5. , an image reference that Docker uses as a template for building and running a container: A Dockerfile is a text-based document that's used to create a container image. 106. The backslash disappears in the RUN dir c:\ command because it works as an escape character, which makes As you already know, several instructions have shell and exec forms. May 26, 2015 · I have written a Dockerfile which looks like this. The resulting committed image will be used for the next step in the Dockerfile. sh like this #!/bin/bash mkdir /root/. Nov 9, 2020 · Let’s set a base image in the Dockerfile. Dockerfiles are text files that include keywords to define how to build a specific image from a base image. /setup. Download the Dockerfile to a directory on your machine, and from that same directory, run the following docker build command. 04 RUN apt-get update RUN apt-get install -y wget Now I'm having a file called abc. Answer based on the following tutorial: How to commit changes to docker image Sep 15, 2014 · Normally, docker containers are run using the user root. Often you will find multiple RUN instructions in a Dockerfile. Docker & Laravel : configure: error: Package requirements (oniguruma) were not met. You can only really expose ports in the Dockerfile, if you want the flexibility to publish the ports, you'll need to use the -P opting with docker run. fail . dockerignore in the root directory of the context. Run multiple scripts in docker image. docker build --tag myapp --file c:\dev\mycustapp-master\Dockerfile change for build --tag myapp --file c:\dev\mycustapp-master\Dockerfile . sh && …', or you could even go so far as to avoid bashisms (like source) entirely, and instead opt to only ever use valid POSIX equivalents, e. Conclusion # Docker is the standard for packaging and deploying applications and an essential component of CI/CD, automation, and DevOps. sh' returned a non-zero code: 1 Whatever you run to call docker build needs to handle that exit code and stop running at that point. Suppose I have the following RUN commands: RUN python -m pip install --upgrade pip RUN python -m pip install --upgrade setuptools RUN pip install -r requirements. 12 && \ nvm alias default 0. env) in one RUN command. 12 && nvm use 0. Edit the command as necessary. pyc /code/ ADD requirements. To avoid copying unnecessary files, use . RUN . RUN executes the command when you are building Image. The RUN instruction executes commands in a new layer, and supports parser directives to customize the syntax and escape characters. Mar 13, 2016 · Basically, the ADD commands from the base image are overwriting the RUN commands in your Dockerfile. / I could find an example with backslash for RUN command, but not for COPY. 0. (or GRUNT) Jul 15, 2021 · Above command will create a single directory with name {dir1,dir2,dir3/dir1 IF objective is to create multiple directories in single command so its bash compatible command shell won't support such way in order to run bash compatible commands in docker build you might need to add like below. Is there anyway to do so when starting a docker container? My goal is to run the gcloud datastore automatically just after typing docker start my_container_name. See documentation, this command allows you to, well, copy the file from host into your image into specified path. For example, suppose you make a change to your program in the main. at the end of the docker build command tells Docker that it should look for the Dockerfile in the current directory. But this user should be able to use sudo inside the container. The image reference is the name and version of the image. run script in Dockerfile. To do this: Split this Dockerfile into two. Nov 29, 2016 · I'm trying to automate a creation of a development Docker image using docker build command with appropriate Dockerfile. See an example of creating a Redis server image from Ubuntu base image and running a container from it. We will build an image using the command docker image build. Use them to parameterize values of Dockerfile instructions. 12 && \ nvm use 0. In other words, is there a difference between these commands in a Dockerfile? ENV FOO bar vs. get command executed result from docker container. COPY: Apr 19, 2016 · With a multi-line command, the commented lines are ignored, but you need to comment out every line individually: $ cat Dockerfile FROM busybox:latest RUN echo first command \ # && echo second command disabled \ && echo third command $ docker build . Thus there are two questions: Where is the output of all the RUN commands in a Dockerfile? In first example we are creating Dockerfile and providing base image and adding jar an so, after doing that we will run docker command to build an image with specific name and then run that image. Just go to the directory with your code and run: instead, Java can read the command line parameters either through the command line or by _JAVA_OPTIONS environment variable. Note: The first encountered ADD instruction will invalidate the cache for all following instructions from the Dockerfile if the contents of have changed. It's a best practice as it will reduce the size taken by your image. I understand the docker build --no-cache will disable caching for the entire Dockerfile. If you want to run . md \ gulpfile \ another_file \ . /run-tests. Run your container using the docker run command and specify the name of the image you just created: Jun 6, 2020 · In this example, we provided a command (/bin/bash) as an argument to the docker run command that was executed instead of the one specified in the Dockerfile. RUN means it creates an intermediate container, runs the script and freeze the new state of that container in a new intermediate image. My script file looks like: #!bin/bash docker run -t -i -p 5902:5902 --name "mycontainer" --privileged myImage:new /bin/bash Dec 2, 2019 · GetFileAttributesEx c:RUN: The system cannot find the file specified. Instead the command ADD url can be performed even without having installed curl (or analogues) inside the container just because it is executed by the host (it uses the Go libraries with which it is written docker) during the creation Jul 23, 2019 · Also, notice that RUN is for executing a command that will change your image state (like RUN apt install curl), not for executing a program that needs to be running when you run your container. As suggested in my comment, you could write a Dockerfile that looks like: FROM python:3 RUN pip install --no-cache-dir --upgrade pip && \ pip install --no-cache-dir nibabel pydicom matplotlib pillow med2image # Note: we had to merge the two "pip install" package lists here, otherwise # the last "pip install" command in the OP may break dependency resolution… Feb 11, 2024 · This is similar to using the --name option with the docker run command. Next time, when starting the docker container, use the new docker image you just created: sudo docker run **NEW_IMAGE_NAME** - this one will include your additional installations. In my Dockerfile I h To start a service in a Dockerfile, you should use either a CMD or ENTRYPOINT statement as the last line (depending on whether you might want to pass an argument in the docker run command, normally. It executes commands, adds a new layer, and commits the results. Build arguments are variables for the Dockerfile itself. docker run -d --name bar -p 10000:4200 me/ngx-admin:dev docker run -d --name foo -p 10001:4200 me/ngx-admin:dev Jul 3, 2024 · Examples Of Docker Run Command. sh. For example i need to set SECRET_KEY_BASE for Rails app just once without changing as would when i run: docker run -e SECRET_KEY_BASE="$(openssl rand -hex 64)" Instead it i write to Dockerfile string like: May 25, 2015 · I tried VonC's solutions, still not able to use pipes in Dockerfile RUN. Sep 29, 2020 · RUN in Dockerfile Instruction is used to execute any commands on top of current Docker Image. May 12, 2017 · Dockerfile. Without being 100% sure - I think such an approach reduces the number of layers avoiding multiple commands in a single RUN When you run a build command, the build client looks for a file named . RUN has two forms: RUN <command> (shell form) RUN ["executable", "param1", "param2"] (exec form) RUN printf '#!/bin/bash \n $(which apt-get) install -qq $@' > /usr/bin/install RUN chmod +x /usr/bin/install Most of the time I use aliases just in the building stage and do not go inside containers, so the first example is quicker, clearer and simpler for every day use. java CMD java HelloWorld The resulting committed image [from line two] will be used for the next step in the Dockerfile. /code:/var/www/html RUN mkdir -p /var/www/html/foo In this way I created a simple php: fpm container. For example commands. run-all. If your kernel supports binfmt_misc launchers for secondary architectures, buildx will pick them up automatically. If file-which-may-exist is present, it will also be copied. Mar 19, 2019 · FROM alpine:3. Command: docker build --build-arg BUILD_TOOL=GULP . So to illustrate this point I have made our Dockerfile have a RUN command that exits with 1. For example: DOCKER_BUILDKIT=0 docker build -t testApp . In the entrypoint you can specify your custom script, and then run catlina. FROM busybox RUN echo This is the A > a RUN echo This is the B > b RUN echo This is the C > c Dockerfile. After that, I imported this file and used my variable in another RUN command. First, open PowerShell as administrator. Change the second line to RUN javac HelloWorld. e. ; docker run Syntax. sh . Nov 13, 2019 · You can run multiple containers off of the image in exactly the way you show, using the image's port number as the second number in the docker run -p option. The instruction is in the form of FROM <base_image>[:tag]. COPY directive inside Dockerfile. Nov 24, 2017 · As part of a Dockerfile, I am attempting to modify a text file (ssh_config) to contain a variable passed through by the user (as an ARG) to the docker container at build time. COPY test. A Dockerfile can have many RUN steps that layer on top of one another to build the image. Let's say I want combine these commands. Aug 8, 2017 · You can use the entrypoint to run the startup script. Before you can run Docker container startup commands, you must first create a Dockerfile. They're both declared in the Dockerfile and can be set using flags for the docker build command. Mar 18, 2024 · Apart from the Dockerfile CMD directive and the docker run command, we can execute multiple commands with the docker-compose tool. Mar 23, 2021 · As far as I'm concerned you can run a command line when building an image with RUN or when running a container with CMD. Is the below OK to use? Oct 16, 2021 · Every new RUN of a bash is isolated, "starting at 0". dockerignore . RUN pdm install etc. Aug 28, 2019 · Learn what Dockerfile is, how to create one, and how to build a Docker image with Dockerfile. If the Dockerfile needs to invoke the RUN command, the builder needs runtime support for the specified platform. Using a dockerfile argument in a RUN statement. bash -c 'source /script. sh RUN . Is it possible to disable cache for a specific RUN command? Jun 18, 2024 · RUN command: When you use a RUN command in your dockerfile, it always creates a new intermediate image layer on top of the previous ones. g. May 15, 2015 · To make it review friendly, you may need a multiline COPY command. docker run is an alias for the docker container run command. Learn how to use Dockerfile instructions to build images automatically. RUN: Let’s you run commands and it’s one of the most used instructions in Dockerfile. Generally, a service will start in the background as a daemon however, so having this as your last line: CMD ["service", "ssh", "start"] Jan 15, 2019 · If you want to run some script "on the fly" with php-cli you can create the container and remove it immediately after the script execution. In order to set the value of user when running you should specify it as docker run -e user=ssh so that in your case the following would work. txt c:\\ will escape the second backslash and the command becomes COPY testfile. Jun 24, 2018 · The RUN instruction will execute any commands in a new layer on top of the current image and commit the results. 17. dockerfile cmd run multiple command. RUN also has a shell form for running commands. Apr 14, 2020 · To set an environment variable in the Dockerfile, you need to define either an ENV which will be persistent both during the build into the containers that are deployed from that image, or an ARG that can be adjusted from the build command and only applies during that stage of the build and not into containers that are later deployed from that Jun 13, 2018 · But the second question refers to the user inside a container. It provides instructions to the image builder on the commands to run, files to copy, startup command, and more. You can choose any user to run inside the containers with USER <any user> in your Dockerfile, regardless the user you use outside the container to build or run that image. This is how you can pass an argument to docker build. 10 RUN mkdir tmp123 RUN cd tmp123 RUN pwd has the output : Uploading context 10240 bytes Step 1 : FROM ubuntu:12. Mar 24, 2020 · You are in the right track and missing a few parameters. For example, mind that setting WORKDIR /MY_PROJECT before the bash commands in the Dockerfile does not affect the bash commands since the starting folder would have to be set in the ". In a UNIX shell, the exit code 0 means that all is well with a command. Looks like Dockerfile is not doing well on this. RUN npm install python libraries. sh: This is copied and run inside the container, installs packages, removes unnecessary files, etc. com Feb 7, 2024 · Learn how to create and run Dockerfiles for different purposes, such as updating and installing packages on Ubuntu and Rocky Linux. RUN <command> Executes any commands in a new layer on top of the current image and commits the result. I'd like to use a different user, which is no problem using docker's USER directive. 2 joins them:. Now that you have an image, you can run the application in a container using the docker run command. Update. RUN export FOO=bar Jul 22, 2020 · If you run now docker images, you will see NEW_IMAGE_NAME listed under your local images. docker run -p 9000:9000 -d me/app 1 prod Jan 20, 2016 · I had same issue and found way to set environment variable as result of function by using RUN command in dockerfile. Let's recap. Jul 14, 2021 · Creating a Dockerfile. java. apt-get. Whenever a layer changes, that layer will need to be re-built. RUN command_1 ENV FOO bar RUN command_2 into. In its most basic form, the command requires only one argument, i. But they each serve a distinct purpose. The web service uses an image that's built from the Dockerfile in the current directory. A docker run command takes the following form: $ docker run [OPTIONS] IMAGE[:TAG|@DIGEST] [COMMAND] [ARG] The docker run command must specify an image reference to create the container from. FROM scratch RUN javac HelloWorld. 1. It then binds the container and the host machine to the exposed port, 8000. I do the final parts of this through a bash script called run-all. js" ] CMD [ "0", "dev" ] Running it in dev would use the same command. Mar 21, 2024 · The docker run command also lets you modify the ENTRYPOINT command from the Dockerfile and run something else, but only for that container. . Start an app container. By default (in a Linux Dockerfile), RUN <shell commands> is equivalent to sh -c '<shell commands>, and docker build will execute that step, and commit the results once the sh -c terminates successfully. sh that I run through CMD in my Dockerfile. PS C:\John> According to my understanding, the first backslash in COPY testfile. WORKDIR <directory> Sets the working directory for any RUN, CMD, ENTRYPOINT, COPY, and ADD instructions that follow it in the Dockerfile. I exported the variable to file (.
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