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<h1>Dockerfile run multiple commands sequentially</h1>
<p class="abstract sans">Dockerfile run multiple commands sequentially. Both do exactly the same thing but the first commits the change to the next image layer. e. % docker run -it --rm alpine:3. With multi-stage builds, you use multiple FROM statements in your Dockerfile. Step3. docker build -f mysql. Let’s see how this can be done. Nothing worked. I have 6+ scripts and growing to run on a folder, what is the best way to have them run one after the other. Each FROM instruction can use a different base, and each of them begins a new stage of the build. Executes any commands in a new layer on top of the current image and commits Jan 28, 2019 · This extends to ENTRYPOINT and CMD commands too. When you build your Docker image, Docker will read in your RUN command and build it into your image as a separate image layer. Step 1/2 : FROM MyBaseImage. , set -eux; some command; some other command;). sh: This is copied and run inside the container, installs packages, removes unnecessary files, etc. May 10, 2022 · 1. Sep 3, 2015 · You can use different approaches (e. docker run <image> bash -c "echo 'hello' && echo 'world'" In my use-case I must use the docker run command. txt . sh; install. Aug 2, 2022 · RUN ${MYCOMMAND} I also need to know if I can run multiple commands in the same layer of the dockerfile. FROM ubuntu:16. Sep 29, 2020 · Example 1: # To run apache2 in foreground. 7-stretch. /other. Dockerfile . As an aside, if you really want an easier way to run multiple entrypoint fragments in a way that's easy to extend with child images, I use an entrypoint. RUN npm install COPY src . I am okay with passing these commands as command line arguments. Is there a way that I could create a . Note that regardless of whether the escape parser directive is included in a Dockerfile, escaping is not performed in a RUN command, except at the end of a line. The Dockerfile instruction syntax is defined by the specification reference in the Dockerfile reference. Below is my Dockerfile. The second parameter in the list is a delay to start the . Should do! Feb 13, 2015 · To run multiple commands in docker, use /bin/bash -c and semicolon ; docker run image_name /bin/bash -c "cd /path/to/somewhere; python a. edited Mar 26 at 23:58. txt && ls'. /. For example: postgress + java. The OP tried the command with [ ] to no avail to accomplish the original problem. Feb 6, 2018 · Multiprocessing . Jun 4, 2020 · Now we need a way to pipe multiple commands. any help appreciated. py files simultaneously. A simpler way to execute multiple commands is to use. Say, You have one database that is used by a single web application. | tar -x. RUN chmod + x startup. In a master . FROM alpine:3. 2 usr/bin/env And a Dockerfile that looks like: FROM scratch COPY . ” It is a similar concept to how Concurrently works, but the syntax is slightly different and npm-run-all touts how it can shorten a very long, single start command like: npm run clean && npm run build:css && npm run build:js && npm run Dec 30, 2020 · Three steps: 1. I know its possible to use ps -ef to obtain the pids of the running processes and create a polling loop to check when they terminate with kill, but this feels extremely convoluted and unnecessary. RUN apt-get install -y nginx=1. The first one does not execute the commands from the script and the second one does this, but closes the terminal session. $ docker run image /bin/bash -c "date; cal" Oct 9, 2017 · In your Dockerfile, you can use the verb EXPOSE to expose multiple ports. Thanks to @David Maze for suggestion. Nov 13, 2013 · You can additionally use for example Supervisord or similar to take care of launching multiple services inside single container. docker build -f /path/to/a/Dockerfile . ” It is a similar concept to how Concurrently works, but the syntax is slightly different and npm-run-all touts how it can shorten a very long, single start command like: npm run clean && npm run build:css && npm run build:js && npm run You can't have multiple entry point in a docker image. WORKDIR /app. js. This is designed to be run within the pipenv environment. RUN executes the command when you are building Image. Define all the . Just specify the image: or build: key in the compose file to use this dockerfile/image. py` as `args` A third option is to use both pip install and python myscript. Try using the conditional execution & or the && between each command either with a copy and paste into the cmd. exe window or in a batch file. – . FROM node:latest WORKDIR / usr / app COPY package. Step 2/2 : RUN service ssh start. Since most Docker images are built using some form of Linux base image, then the backslash strategy works here as well. d folder that is processed by an entrypoint script in my base image. Oct 5, 2019 · In your Dockerfile, after you copy your files, you can use a pipe in the CMD, so you can run multiple scripts at the same time. See this for more information. May 22, 2016 · Run multiple commands one after another in cmd. bat file. Solution 3: Use Both `pip install` and `python myscript. Mar 30, 2022 · Often you will find multiple RUN instructions in a Dockerfile. docker-compose. The chaining you refer to relies on the && operator, which is a bash operator that executes the left hand side command, but then only executes the right hand side command if the left hand side command was successful (returned with code 0). For example, if you want to run three commands – command1, command2, and command3 – in a container named “mycontainer”, the complete syntax would be: docker exec mycontainer /bin/bash -c "command1 Jul 19, 2018 · You need to use one shell to run the command in docker. – Sirko. Then, with a single command, you create and start all the services from your configuration. Solution which The escape character is used both to escape characters in a line, and to escape a newline. A Dockerfile will only use the final CMD defined. How to run multiple Scripts one by one in a powershell script. Mar 13, 2016 · Basically, the ADD commands from the base image are overwriting the RUN commands in your Dockerfile. I am trying to use a docker-compose file to include all these python scripts under the same network and volume so that each OCR script Nov 14, 2023 · If you need to build a Docker image from a different path, however, you need to use the -f flag. My goal is to them put my container onto my repo, and share it, along with all of the /bin programs I have written. Your Dockerfile should look like this (I assume that the files are in your current directory): FROM python:3. More information is here. You can combine all these pieces to pipe a command into the container: Nov 12, 2019 · command: ssh -o "StrictHostKeyChecking no" user@hostname "cd ~/profile-store; git pull; npm install; forever start app. Outside of that you are starting to require expect scripting. In this method, the commands are executed one after another in a sequential manner. js && node /main/main. the WORKDIR in the first part is /usr/src/iotd and not app. ps file - I have put links to the power shell scripts that need to be run in order Jul 29, 2020 · And Docker Compose has a default bridge network defined for all services, so you shouldn't need that if you were still using docker-compose. tried python subprocess also to start other python processes, didn't work. RUN in Dockerfile Instruction is used to execute any commands on top of current Docker Image. CMD happens at run time. yml file offers a quick solution for simple Sep 21, 2017 · 6. For example, you can use supervisor to administrate your process Oct 13, 2020 · The legacy Docker build engine executes the build of the stages sequentially, on the other hand, Buildkit computes the dependency graph of the stages and parallelize the builds. A Dockerfile can have many RUN steps that layer on top of one another to build the image. sh file which will take care of running these commands in sequence. Put the two commands in a shell script, COPY the shell script in the Dockerfile, then use that shell script as the entrypoint. EXPOSE 3000 80 443 22 Step2. What are you actively trying to do here? If you're trying to run multiple processes, consider using something like supervisord. Oct 3, 2019 · When I put the background command first in command, the server is not coming up and I'm only seeing the output from background script. / # apk add vim. Our initial dockerfile becomes as shown below. Dec 15, 2023 · In this article, we’ve discussed how to run multiple commands in a running Docker container. docker build -f wildfly. At run-time the image can be invoked using different commands. It seems to say bash -c "ls -l && ls" in the console, so you might want to experiment. docker-entrypoint. (in second iteration should install packages from server and in the next run unit tests in client) Feb 10, 2018 · Also, don't try to send the command to execute into the container via stdin, but just pass the command to run in your call do docker exec. Docker also allows for it in other Dockerfile instructions Apr 6, 2018 · I tried adding the two commands in the CMD array, and I also tried to put them in a shell file and starting the shell file. I figured the best way to run some commands is to write a custom Dockerfile that does everything I want before the official CMD is ran from the image. Rather than write a complex shell command (especially as an ENTRYPOINT), it's usually easier to write a separate shell script. py /. * Starting OpenBSD Secure Shell server sshd [ OK ] Removing intermediate container a1afe0c2ce71. g. Create your files normally, and just COPY them to the image instead of creating them with an awkward chain of shell co Aug 4, 2017 · 2. docker. Apr 20, 2021 · However, the wait terminates immediately. The answer here is that RUN nginx -g 'daemon off;' is intentionally starting nginx in the foreground, which is blocking your second command. These two statements should be equivalent. When you execute the docker build command Aug 14, 2017 · For example, we can produce a container that contains only the /usr/bin/env command (and necessary shared libraries); the complete image source looks like: Dockerfile lib64/libc. If I had 4 apps the command would look similar to this. CMD ["/usr/sbin/apache2", "-D", "FOREGROUND"] Example 2: FROM ubuntu:latest. Jul 20, 2018 · I'm not sure you understood the question. Conclusion: May 5, 2020 · I see your point, yes, changing a common file would mean all the images would to be rebuilt. In between those, we put all our commands as the content of our script to be run by the shell! More ways to run… So far, we’ve seen some basic syntax. COPY package-lock. so in summary, yes docker executes all commands in order. You then would like to build an new image based on above Dockerfile. answered Jun 6, 2021 at 8:44. If Dockerfile has more than one CMD Oct 23, 2018 · After first command of the last snippet the script waits while the java process exits and only then will start the second java. Use the followig syntax to run multiple commands in a running Docker container: $ docker exec -it <container> <bash|sh> -c "<command1>; <command2>; <command3>" – example – $ docker exec -it c7d42807e9c0 /bin/sh -c "whoami; cat /etc/alpine-release" root 3. dockerfile A Dockerfile is a text file containing instructions for building your source code. 0-mysql. py". This is an example of a docker container running mysql, apache and wordpress within a single container. This solution is more relevant where you have to use with_dict dictionary with running multiple commands (without requiring with_items) I want to copy some files to my images and I wan to use the ADD command. Any idea? Btw: The commands should come from outside the container. As you can already see, its hard to debug. docker build -t foo:tag . Sep 10, 2021 · for seeding service to run after migrations has completed you have 2 options: Use service_completed_successfully with depends_on in seeding service: depends_on: migrations: condition: service_completed_successfully. . EXPOSE 8080 CMD ["startup. CMD nodemon /books/booksServer. Run multiple processes in a container. With this in mind, we can refactor the Dockerfile to speed up the build time. I don't have a container running, so I'll use docker run instead, but the code below should give you a clue: Sep 23, 2014 · A lot of times user inputs can be redirected into a program or specified within the command line using arguments for example: { echo "remotecommand 1" } | telnet localhost 1234. May 20, 2021 · A multistage build allows you to use multiple images to build a final product. – Dec 25, 2018 · When I run this project with docker-compose up --build, only the last CMD command runs. EXPOSE 4555. sh autorestart=false autostart=true process_name=agent Jul 31, 2020 · RUN npm install. ssh -o StrictHostKeyChecking=no 192. The args are then passed as commands to the shell. RUN is an image build step, the state of the container after a RUN command will be committed to the container image. The first script to take all PDFs are MainBankClass. sh"] With this, we are able to use one command to No, it is not. Jan 17, 2024 · This approach allows us to execute multiple commands sequentially within the same step. In case we need command2 (python) will be executed if and only if command1 (cd) returned zero (no error) exit status, use && instead of ; docker run image_name /bin/bash -c "cd /path/to/somewhere Oct 30, 2015 · Use printf to allow a single RUN command to output multiple lines of text, using to insert newlines. Starting curl version 7. bash -c "command1 ; command2" & This is especially useful in a bash script when you need to run multiple commands in background. Mar 22, 2024 · By defining multiple services in the Docker Compose file, you can run multiple commands simultaneously. Multiple commands in Docker Compose can be executed through various methods, each suitable for different scenarios. jar &), but insert a loop with a health check (e. bash -c 'cd /var/log ; tar -cv . its a bit complicated with single and double quote together docker Dec 9, 2014 · To achieve that, I'd have to use: docker run --rm dockerfile/python bash -c 'cat > hi. A shell script that will run our commands. sh COPY startup. Conclusion. You can use bash shell as well. We use the <<EOF to introduce the heredoc (just like in sh/bash/zsh/your shell of choice), and EOF at the end to close it. docker run. In a multistage build, you have a single Dockerfile, but can define multiple images inside it to help build the final image. sh autorestart=false autostart=true process_name=java-app [program:java] command=/log-agent. log' \. js && nodemon /customers/customersServer. e. So it works by, sort of, running the one bash command with a parameter that is the 2 commands I want to run. If you want start the first jar, wait while it boots, then start the second jar, you need to use your second snippet (with java -jar docker-spring-boot. / ENTRYPOINT ["/usr/bin/env"] And a file bar. May 17, 2019 · The last line should not end with && \ - not sure if it is the problem but it sure is a problem. RUN apt-get install python. However you can of course still do this and it's covered in the docker documnetation. Jan 30, 2018 · run command : docker run --runtime=nvidia -p 5000:5000 out_image the same shell script worked when I go to terminal and run. A container's main running process is the ENTRYPOINT and/or CMD at the end of the Dockerfile. /wildfly. command: ["/bin/sh","-c"] args: ["command one; command two && command three"] Explanation: The command ["/bin/sh", "-c"] says "run a shell, and execute the following instructions". sh and. pip install app_3 && \. py files simultaneously as you want. 381 2 6. Jan 20, 2020 · 1. Jul 29, 2020 · Summarize the problem: The Python package basically opens PDFs in batch folder, reads the first page of each PDF, matches keywords, and dumps compatible PDFs in source folder for OCR scripts to kick in. This will likely be calling some type of process, such as nginx, bash or whatever process your Docker image runs. When I put the flask run command first, the background script is not starting at all. so. sh: #!/bin/sh. I read in the Docker documentation about regular expression for ADD, but I don't know what kind of expression can I use? I want something like this May 30, 2017 · So alternatively you can chain the commands in a single line then pass the string to the bash command to spawn a new process which will handle the execution. Jun 15, 2020 · same command when running inside containers works ok. This command is intended to start docker containers with this as the foreground process. Ranjan MP. implement some busy wait script in seeding service command. Don't use zero for the delay. docker-compose is the run process, which specifies a group of Jul 10, 2018 · COPY copies files from your host machine to the image, RUN runs inside the container during it's build process, and fails because there really is "No such file or directory" in there. To specify the Dockerfile to use, use the -f argument, e. ; This is a terrible practice. In Compose, these arguments correspond to the dockerfile and context properties. ---> 56f88e347f77. py a . Nov 24, 2015 · 284. May 2, 2019 · Option 3: npm-run-all. 1. /mysql. The image should contain your application's code, and all of its installable dependencies. The question was "Is it possible to copy multiple files to different locations in a Dockerfile?" not "Why isn't this command working?". a. 36. 10. Command groups won't work because they run on the host and semicolon separated commands can get messy. COPY . Where I encounter this scenario I build a single image that contains multiple binaries. Mar 12, 2017 · Dockerfile: As usual, but depending on the number of commands we need to run we might have an install. IMO, the simplest way to test stuff is to just use a container as a sandbox: docker run -it dockerfile/python bash. I know usually you want to separate containers for multiple processes, but I was having gRPC issues when doing this So I want to try it as a single dockerfile for now. Hence, I think the previous CMD commands are killed in Dockerfile because when I remove the last two CMD, the first CMD works well. Mar 10, 2022 at 12:18. docker build -f other. No, that's not the correct way to this. RUN apt-get update. Create for each . 6. Run as many . Edit:-. npm start. user16276760. In shell scripting a semicolon separates commands, and && conditionally runs the following command if the May 2, 2019 · The NPM page proclaims npm-run-all “A CLI tool to run multiple npm-scripts in parallel or sequential. b. May 28, 2020 · There is only one command that can be executed. Jan 5, 2018 · RUN happens at build time. Yes it is ok to combine RUN commands and it will reduce the number of layers in the docker image too! RUN python -m pip install --upgrade pip && python -m pip install --upgrade setuptools && pip install -r requirements. This is scripts/pipenv-run-tests. In your case, the supervisor config file could be like this [program:java] command=/entrypoint. Apr 20, 2022 · @x89 the behavior will be the same in docker-compose. For example, I want to run a Hello World application in Go. /file. pip install app_2 && \. Without being 100% sure - I think such an approach reduces the number of layers avoiding multiple commands in a single RUN Jun 30, 2017 · A Dockerfile is supposed to be a sequential list of instructions to produce an image. Refactor Dockerfile to use parallel multistage build. Probably the most common use case for RUN is an application of apt-get. Moving on, this package is another popular option from NPM, called npm-run-all. May 21, 2022 · Depending on what you want to run, this might be a good or bad idea. * php7. In this case, it is also possible to execute multiple commands by executing a shell script. The following Dockerfile has two separate Jun 23, 2019 · This is a process that includes two commands, whereas in the first example, the pip install command can be considered a building command rather than a test command. yaml: version: '3' # Can be used as an alternative to VBox/Vagrant services: mongo: container_name: mongo image: mongo build: context: . docker build . with_dict variable (looping) and I had to run 3 commands on each item. Consider these two scenarios Dockerfile. # Runs the Django test suite, flake8, and generates HTML coverage reports. Dec 12, 2018 · The end result is pid 1 in the container is now running your command as the deploy user. FROM python:3. the question: Can I create another Docker for another command, which will contain the output of the previous Docker? Jan 1, 2024 · Method 1: Sequential Execution with &&. apt-get. This allows us to specify the commands directly in the workflow file. And looking at the COPY documentation, there really is not a way to copy multiple files to multiple destinations with one COPY, only multiple sources to one Sep 21, 2018 · Compose is a tool for defining and running multi-container Docker applications. Overriding the default command directly in the docker-compose. However, the implication from your example is that you're trying to use some kind of init system for your cmd. Aug 18, 2017 · There’s no magic or special things happening here. js". This led to the answer: Escape character in Docker command line I ended up doing this: sudo docker exec boring_hawking \. In this post, you’ll learn about the core concepts of multistage builds in Docker and how they help to create production-grade images. Keeping the connection open and reusing it is very common for standard clients running a web-app. The problem is it need multiply command: cd client. I thought of writing a function and getting just its body, it turns out you can do that with a simple declare and sed call. The below example shows how to run multiple commands using a shell in docker. However, I am not able to do so. My source code is going to be the simple Hello Jun 4, 2020 · You can have more than one Dockerfile in the same directory if desired. RUN npm install nodemon -g. In my case, part of my variables were in a dictionary i. Docker builds the image fine, giving the following information. npm package #2: npm-run-all. bat to start the python file. Is there any approach to run multiple Python scripts and an executable file in the background? Mar 10, 2022 · asked Mar 10, 2022 at 12:15. RUN executes a bash command within the container being built. CMD /bin/bash. bat files in the list of lists. # This script is called by using the shortcut defined in Pipfile: Jun 27, 2019 · Eventually, you will find it very easy and simple to just run only one command on docker. Is it possible to run multiple processes without supervisord or docker-compose? Apr 28, 2023 · Running two things in the same container is actually a bit of an anti-pattern for containers. For example: Sending multiple requests on the same TCP connection: Jul 28, 2019 · They should run sequentially – the shell && operator waits for the previous command to execute and runs the next command only if its exit status is 0. sh: Dockerfile: Be sure to chmod +x the script, either before copying or in a RUN command in the Dockerfile. 168. You use a script that does this like so: #!/bin/bash. #Install nginx. /requirements. 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. json . RUN apk add vim. And then just do stuff in that container's shell. bash -c "Command string". tried without nohup, didn't work. txt Aug 4, 2021 · The image I'm trying to run, has already an entrypoint set in the Dockerfile, so solution like the following seems not to work, because it looks my commands are ignored, and only the original entrypoint is executed. Running RUN nginx will start nginx, create the master and child nodes and (hopefully) exit with a zero status code. py. " It is a similar concept to how Concurrently works, but the syntax is slightly different and npm-run-all Mar 27, 2015 · FROM ubuntu MAINTAINER [email protected] RUN ["name. Here's a cleaned up Dockerfile with all the scripts copied in, with the addition of an entrypoint file. docker run foo bash -c "echo Foo;echo Bar" But none of this works. this is a two-stage build. Here are the most common types of instructions: Defines a base for your image. Oct 29, 2015 · 205. COPY 1. I am not sure how can I chain the commands. 6 lib64/ld-linux-x86-64. sh . The NPM page proclaims npm-run-all “A CLI tool to run multiple npm-scripts in parallel or sequential. Executing: RUN printf 'exampletexthere' >> example. Then it is probably easier to run both in a Mar 19, 2024 · This approach is useful when modifying the container’s behavior at runtime without changing the Dockerfile. 1. ---> 7879cebe8b6a. This makes it easy to orchestrate the execution of multiple commands in a controlled and reproducible manner. If that's the case, consider using something like dumb-init or Jun 8, 2020 · Run Multiple Commands in Docker Container. I have seen and tried this thread - it did not work unfortunately. RUN pip install app_1 && \. With Compose, you use a YAML file to configure your application’s services. You can selectively copy artifacts from one stage to another, leaving behind everything you don't want in the final image. However, you can use alternative to launch multiple process. Each RUN instruction gets executed as its own container. 0 php7. key. the second WORKDIR command only applies to the later stage, where the subsequent COPY knows the WORKDIR command prior to it. You only need to call it with bash -c for. env that contains: BAR For more information about RUN, see Dockerfile reference for the RUN instruction. Each service can have its own dependencies, environment variables, and networking configuration. Note: The first encountered ADD instruction will invalidate the cache for all following instructions from the Dockerfile if the contents of have changed. ---> Running in a1afe0c2ce71. Jun 19, 2023 · The RUN statement executes commands in a container running the current image layer with the result becoming the next layer. set -e. could be some problem with the quotes, I am not sure. It's best practice to separate areas of concern by using one service per container. If Docker container runs with a command, the default command will be ignored. This does not create a separate image layer. sh -c "echo 'Command 1' && sleep 5 && echo 'Command 2' && sleep 3 && echo 'Command 3'". docker run -p 3001 May 7, 2019 · The first script runs successfully and then the container terminates. CMD - CMD instruction allows you to set a default command, which will be executed only when you run container without specifying a command. WORKDIR /opt/. 0-fpm php7. Jul 31, 2021 · docker exec -it foo bash < my_commands_to_exexute_inside_the_container. # Start the first process. Is there any proper way to run these two commands on container start up? docker build . txt. Dockerfile together with {docker build} is the build process, which specifies the basic image to be used and have a temp container created in the building process and RUN any additional steps/commands to the final state and use the final state as the result built image. Jul 23, 2019 · 1. If your upload-sourcemaps command is asynchronous (it starts the upload in the background and returns immediately) the shell has no direct way to wait for it. 0, the --next or -: command-line option allows to chain multiple requests, and usable both in command-line and scripting. That service may fork into multiple processes (for example, Apache web server starts multiple worker processes). exe", "input1", "output"] and have my container run my program, and create an output. py as args in the GitHub Actions workflow. sh file, put all these commands and simply execute the . I need to install a bunch of apps similar to pip install <app>, in the dockerfile. or. Then you can use the -p to map host port with the container port, as defined in above EXPOSE of Dockerfile. You use the shell syntax and enclose the commands within quotes. Once the command that you run completes, any changed files get committed as a new image layer. Personally, I try to avoid multiple Dockerfile within a project. 04. Using a backslash is the standard way to break up long lines into multiple lines on Unix-like operating systems. – Jun 25, 2023 · The docker exec command allows you to run multiple commands in a container. The npm page proclaims npm-run-all to be "A CLI tool to run multiple npm-scripts in parallel or sequential. #4: RUN –. CMD is the command the container executes by default when you launch the built image. 11. Docker wait doesn't work in my case because the container doesn't stop after running these commands. You can run multiple commands for a service in docker compose by: command: sh -c "command1 && command2 && command2". This allows a Dockerfile instruction to span multiple lines. using curl) between java launches. If it was important for your application to print the contents of that file before running the main thing the container does, you could write an entrypoint script like Jul 30, 2021 · RUN <<EOF apt-get update apt-get upgrade -y apt-get install -y EOF. After that, we explored the same using the ENTRYPOINT/CMD directives in Dockerfile . 6 To execute the next command only if the Mar 31, 2024 · With supervisor, you can run several process in one container. Run multiple commands sequentially within a Docker Compose service using the && operator. Always combine RUN apt-get update with apt-get install in the same RUN Dec 16, 2013 · I faced the same issue. Using the command: or entrypoint: keys in your compose file, you can override the behavior as well (similar to the --entrypoint flag for docker run or providing a command at the end of docker run). Apr 19, 2019 · 6. May 26, 2016 · 1005. First, we learned to execute multiple commands using the docker run command. To learn more about all the features of Compose, see the list of features. Because it installs packages, the RUN apt-get command has several counter-intuitive behaviors to look out for. 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