Run command in docker file. Dec 27, 2022 · To run multiple commands in the docker-compose file by using bash Create . You can reference the filename, which is parsed to extract the environment variables to set: $ docker run --env-file=env_file_name alpine env With docker-compose. Step 1/2 : FROM microsoft/nanoserver. 100. The resulting committed image will be used for the next step in the Dockerfile. 01 Nov 22, 2016 · Here is what run. docker run -p 3001:3000 -p 23:22 In case you would like to expose a range of continuous ports, you can run docker like this: docker run -it -p 7100-7120:7100-7120/tcp Here’s the list of the basic Docker commands that works on both Docker Desktop as well as Docker Engine: Container Management CLIs. Some RUN commands depend on the ability to pipe the output of one command into another, using the pipe character (|), as in the following example: RUN wget -O - https://some. Dockerfile. site | wc -l > /number Docker executes these commands using the /bin/sh -c interpreter, which only evaluates the exit code of the last operation in the pipe to determine Using the default name allows you to run the docker build command without having to specify additional command flags. To pipe a Dockerfile from STDIN: $ docker build - < Dockerfile. Using the docker run Command Mar 21, 2024 · Single run. e. Run your container using the docker run command and specify the name of the image you just created: Dec 29, 2022 · docker run -it --rm -p 8080:80 imagename --env-file . For example, if the web service configuration is started with bash, then docker compose run web python app. If you need to customize it, SED it. You can manually pull images with the docker pull command: docker pull httpd:latest. /result RUN echo $(cat . Let’s break down what each part of the command does. I'd like to use a different user, which is no problem using docker's USER directive. txt I wish to run all the command in one run command. Here, we are taking the IP address from range. Example: Flaskfile Let's say I want combine these commands. COPY directive inside Dockerfile. However, if you specify the -a option, docker cp sets the ownership to the user and primary group at the source. Here’s the list of the basic Docker commands that helps you inspect the containers Apr 27, 2017 · I have dockerfile FROM centos:7 ENV foo=42 then I build it docker build -t my_docker . In the . Docker Desktop v 4. This is a popular Linux container image that uses Alpine Linux, a lightweight, minimal Linux distribution. If it isn't, it will try to pull it from Docker Hub. Hello from Docker! This message shows that your installation appears to be TL;DR/Notice: If you experience a directory being created in place of the file you are trying to mount, you have probably failed to supply a valid and absolute path. /test. It includes all the instructions needed by Docker to build the image. 12 && nvm use 0. Commented Jul 21, 2022 at 18:41 The "docker run rm " command makes us run a new container and later when our work is completed then it is deleted by saving the disk space. IPAddress}}{{end}}' 9ce4da8eb682 172 Mar 20, 2023 · The Dockerfile is a text file that contains the instructions needed to create a new container image. 4-alpine ADD . RUN useradd -ms /bin/bash vault Below command will not create user . Why is the author using the -v option? He uses the command, like so: docker run -v /var/lib/mysql --name=my_datastore -d busybox echo "my datastore" Now I understand the above command to an extent: Apr 25, 2024 · docker run -d--name container-name alpine watch "date >> /var/log/date. 2-now open the docker file and write your script name instead of sci. The filesystem support of your Jan 6, 2016 · To use docker run in a shell pipeline or under shell redirection, making run accept stdin and output to stdout and stderr appropriately, use this incantation: docker run -i --log-driver=none -a stdin -a stdout -a stderr e. A common convention is to name these <something>. If Docker container runs with a command, the default command will be ignored. Pass arguments after docker image name $ docker run -p 9000:9000 -d me/app 0 dev I had the same issue for dockerfile and multi-arch building. Oct 5, 2022 · To launch your Postgres database and supporting services, enter the docker compose -f [FILE NAME] up command. Use the below command: docker run <image_name>:<tag_name> For Example docker run Now check the Docker service using the command below. Jun 24, 2018 · The RUN instruction will execute any commands in a new layer on top of the current image and commit the results. It always fails with: /bin/sh: 1: COPY: not found or /bin/sh: 1: RUN: not found So, I think that the best course of action is to create a separate bash file which does the copies, something like: Dec 6, 2023 · The ‘docker run bash’ command is a combination of several elements, each with its own purpose. list Fix. With Powershell you can run: Get-Content Dockerfile | docker build -. 33. docker run hello-world. Here’s the list of the Docker commands that manages Docker images and containers flawlessly: Inspecting The Container. Use --dry-run flag to test a command without changing your application stack state. CMD goes as arguments to ENTRYPOINT. 12 && \ nvm alias default 0. git directory; BUILDKIT_INLINE_CACHE=<bool>: inline cache metadata to image config or not Jun 16, 2017 · I have a docker file that includes a python script. RUN export FOO=bar You can't run the mount command inside the container directly, because the container is unable to access the /dev/loop5 device. You can specify the Dockerfile filename using the --file flag for the docker build command. If you want to run . Using either docker run, psql, or Docker Compose, you can successfully start up Postgres using the Official Image! These are reliable ways to work with “default” Postgres. to run the alpine image and execute the UNIX command cat in the contained environment: Sep 29, 2020 · #4: RUN – RUN in Dockerfile Instruction is used to execute any commands on top of current Docker Image. This is a common mistake with a silent and confusing failure mode. Afterwards I used the command. RUN executes the command when you are building Image. ; docker run Syntax. Docker's behavior is to give you an exit code to indicate the failure: $ cat df. You'll see the logs from each of the services Mar 30, 2022 · CMD - CMD instruction allows you to set a default command, which will be executed only when you run container without specifying a command. But this user should be able to use sudo inside the container. dockerfile to use the RUN instruction with the cd command:. Method 2: if you want to do it by command line, from powershell, run the command. dockerignore in the root directory of the context. Jan 20, 2020 · I understand that each RUN command creates a layer. ; Install gcc and other dependencies When possible, I always merge together commands that create files with commands that delete those same files into a single RUN line. If you delete a file that Understanding RUN and source: RUN executes commands in a new shell session each time, and shell-specific commands like source may not persist their effects beyond the RUN command. 1; Docker version 2 days ago · Add a RUN command to update the image and add any application and utilities: $ echo 'RUN dnf -y update && dnf -y install git libgpiod-utils python3-libgpiod && dnf clean all' >> Dockerfile The fedora:latest image includes bash so we can go ahead and build the container without any specific applications to start or ports to expose. 17. Apr 25, 2024 · To run a command in a certain directory of your container, use the --workdir flag to specify the directory: docker exec --workdir /tmp container-name pwd. After this change, the COPY command will have to run again in order for those changes to appear in the image. Just go to the directory with your code and run: See the Go specification for details on these variables. As an example, the following Dockerfile would produce a ready-to-run Python application: Nov 9, 2017 · its very simple. sh && . fail . The following steps create an ext4 filesystem and mounts it into a container. A CMD command is used to set a default command that gets executed once you run the Docker Container. A docker run command takes the following Jan 20, 2016 · run a command, store the result in a file; use command substitution to get the previous result from that file into another command; For example : RUN echo "bla" > . Think of it more like you have ssh'ed into a remote m/c having the image and started the container. General form. docker run is the command to run a container from an image. 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. Jan 1, 2016 · Then, in your Dockerfile, copy your bash file to your image, and use the ENTRYPOINT instruction for running the file when container is being created: COPY script. 2' services: echoer: image: ubuntu:latest command: echo -e '\ttest1';echo test2; Jul 25, 2018 · But this fails as it appears that I can't run COPY or RUN commands inside a conditional statement. May 14, 2021 · And then add these options to your docker build command: kibana. If this file exists, the CLI modifies the context to exclude files and directories that match patterns in it. On Linux or Mac, you can add this to your ~/. Oct 25, 2019 · docker run --env-file env django-polls:v0 sh-c "python manage. The run command creates a new Docker container from an image. By contrast, when you use a volume, a new directory is created within Docker's storage directory on the host machine, and Docker manages that directory's contents. You can also set this command to automatically delete the container when the container stops. 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. Dry Run mode shows you all the steps Compose applies when executing a command, for example: Jun 18, 2024 · RUN command in executable form is: RUN ["apt-get", "install", "firefox"] RUN command in shell form is : RUN apt-get -y install firefox 2. Example 1: FROM ubuntu:latest MAINTAINER [email protected] RUN apt-get update RUN apt-get install -y apache2. ; Administrative privileges. As proposed in this issue comment, one can add a build argument block (name can be arbitrary): Mar 19, 2019 · FROM alpine:3. The following example starts an Alpine container running top in detached mode, then attaches to the container; $ docker run -d --name topdemo alpine top -b $ docker attach topdemo Mem: 2395856K used, 5638884K free, 2328K shrd, 61904K buff, 1524264K cached CPU: 0% usr 0% sys 0% nic 99% idle 0% io 0% irq 0% sirq Load average: 0. The Docker service is up and running on Ubuntu 22. Oct 30, 2015 · I want to write the following RUN command in the Dockerfile. env file, which is used by docker-compose. If you start a container it will run the command you specified in your docker file CMD and will use part of your memory and Apr 4, 2020 · By Jillian Rowe I'm going to let you in on a DevOps secret here: The thing all DevOpsy people love to do is build a super fancy and complex system, then find a way to deal with it like a regular shell. For example, suppose you make a change to your program in the main. The syntax of the new command is as follows: docker container run [OPTIONS] IMAGE [COMMAND] [ARG] The old, pre 1. Nov 1, 2016 · Dockerfiles are not batch files. Some projects may need distinct Dockerfiles for specific purposes. NetworkSettings. com Mar 18, 2016 · From the documentation: Instead of specifying a context, you can pass a single Dockerfile in the URL or pipe the file in via STDIN. sh / RUN chmod +x /script. This command creates a new Docker container from the official alpine image. That's why the docker run command uses the --mount option. docker run is an alias for the docker container run command. But, docker is not preserving the new lines. py Jul 14, 2021 · After you’ve built the Docker image, you’ll need a container to run the Docker image that will execute the commands from the Dockerfile ENTRYPOINT and CMD instructions. Mar 19, 2024 · If we issue the docker inspect command, we’ll see the detailed information about the container in JSON format. Refer to the docker run documentation for more information. Users are encouraged to use the new The host may be local or remote. env) in one RUN command. Single character command line options can be combined, so rather than typing docker run -i -t --name test busybox sh, you can write docker run -it --name test busybox sh. Nobody has mentioned that docker run image_name /bin/bash -c just appends a command to the entrypoint. Docker isn't the only tool you have. Jun 30, 2013 · You can build a Docker image that includes a run command and other configuration, such that a docker run <image> will start the container. CMD "echo" "Hello World!" The file above is called env_file_name (name arbitrary) and it’s located in the current directory. It will work. 5 days ago · The default registry is Docker Hub. Step3. sh #!/bin/bash nvm install 0. Files copied to the local machine are created with the UID:GID of the user which invoked the docker cp command. Let’s again run the Docker container with the docker-compose up command: Feb 6, 2024 · Let’s start by writing the custom-ubuntu-v2. 0 Let’s walkthrough this short script. Look at the logs using the docker compose logs -f command. Sending build context to Docker daemon 3. The important thing to note is, the container is just like a class instance and not for data storage. I've created a little helper command for building and running, in a single command. txt c:\\ RUN dir c:\. But when I try to use the run command on them, I get the same result. Networks -> IPAddress: # docker inspect -f '{{range. Oct 9, 2017 · docker build -t foo:tag . yaml; README. py: 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. docker: This is the base command for the Docker CLI (Command Line Interface). Now I need to run a script file (test. Or if you really, really, really want to CAT into a file -- put it in a real batch file, then ADD/COPY it, then RUN it. See full list on baeldung. txt file. sh"] Notice that the ENTRYPOINT instruction uses the location of the bash file you copied into your image. We can also pick any field from the resultant JSON. This example command sets the /tmp directory as the working directory, then runs the pwd command, which prints out the present working directory: Output. 70 Steps? Yowzers. Docker. Is the below OK to use? Feb 5, 2020 · docker run -it --rm -v . This is particularly useful when the container runs on a remote m/c. USER vault WORKDIR /usr/local/bin/vault it will use vault user License scanning of CycloneDX files Common Git commands Tutorial: Update Git remote URLs Run CI/CD jobs in Docker containers Feb 14, 2019 · The command '/bin/bash -c cd test; . This command eliminates the need to run docker create and then docker start. 3 days ago · docker compose -p project_name images or any other command without service name, it works. docker exec -it containerid sh Whenever a layer changes, that layer will need to be re-built. Jun 16, 2015 · Then when you run the container, click on docker icon on left side bar. docker run --env-file . Also, less lines = less layers. When the build is done, run command: docker image ls. js Docker run. Now that you have an image, you can run the application in a container using the docker run command. log". and run it. py overrides it with python app. It provides instructions to the image builder on the commands to run, files to copy, startup command, and more. Users are encouraged to use the new A container is a process which runs on a host. The easiest way to do this is with CMD from the Docker Builder . Example: Mounting a block device in a container. FROM python:3. py migrate" Here, we run the django-polls:v0 container image, pass in the environment variable file we just created, and override the Dockerfile command with sh -c "python manage. e. 100| to the console. Or connect to it with SSH and then Mar 13, 2016 · The effect of the chained command is: files are listed as existing, deleted, the directory is listed to be empty (as expected). By default, Docker Compose automatically creates a network specifically for the application stack (which is why you didn't define one in the Compose file). 06 0. Docker-compose file content. py. sh In Dockerfile put: Docker run $ docker run -d -p 9000:9000 -e ENVIRONMENT=dev -e CLUSTER=0 -me/app Option 2) Pass arguments. Use Dry Run mode to test your command. md; If any of the files already exist, a prompt appears and provides a warning as well as giving 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. I exported the variable to file (. sh looks like: docker run -d -it -p 80:8080 --name=kz kangzeroo npm run ec2 -- --host=0. In other words, is there a difference between these commands in a Dockerfile? ENV FOO bar vs. Docker images are made up of a series of filesystem layers representing instructions in the image’s Dockerfile that makes up an executable software application. sh Along with having something along the lines of : ENTRYPOINT ["tail", "-f", "/dev/null"] in your docker file, you should also run the docker container with -td option. docker pull name/repo I would like to store the docker file I created with a text editor in a folder together with the python scrip and execute it with a command like. In my Dockerfile I have a run command; RUN echo "|${DOCKER_HOST}|", which correctly outputs |192. Results in: PS E:\myproject> docker build -t cmd . txt CMD ["python", "app. Jun 6, 2020 · Since the run command interacts with containers, it is a subcommand of docker container. Alternatively, you can also run docker compose up --menu=false to disable the helper menu. Docker build is the Apr 24, 2018 · Use useradd instead of its interactive adduser to add user. ) is used to execute commands from a file in the current shell context, typically to set environment variables or configure the shell environment. You must sign in to use this command. Option types. source (or . RUN command_1 && export FOO=bar && command_2 and was wondering if setting the variable with RUN export vs ENV was equivalent. Then you can use the -p to map host port with the container port, as defined in above EXPOSE of Dockerfile. sh Oct 16, 2021 · In fact, since every RUN creates a new commit & (currently) an AUFS layer, if you have too many commands in the Dockerfile, you will use up the limits, so merging the RUNs (when the file is stable) can be a very useful thing to do. 10 image. /run-tests. In its most basic form, the command requires only one argument, i. 12' If you are afraid of that long command line, put those commands into a shell script and call the script with RUN: script. Mar 18, 2024 · Apart from the Dockerfile CMD directive and the docker run command, we can execute multiple commands with the docker-compose tool. systemctl status docker. py"] Make sure those files located precisely under root folder. Below is the result you will get. May 15, 2015 · Before the docker CLI sends the context to the docker daemon, it looks for a file named . Set the working directory to /code. This approach is recommended as it keeps our YAML file clean since all commands are in a separate line. Additionally, I would like to know how you tested of there is a directory named 'foo'. 04. When you use a bind mount, a file or directory on the host machine is mounted into a container. Docker provides the docker run command to create and run the container as a single command. The host may be local or remote. When you run a command that references an image, Docker first checks whether it's available locally. is the project to run npm install in and /tmp is just a directory to mount your project in inside the container. Both of these can be overridden when you create a container from an image. This tells Docker to: Build an image starting with the Python 3. Every line/command is isolated and committed. /env. 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 Sep 22, 2015 · RUN bash -c 'nvm install 0. yml # Verify that local configuration file is copied in & enables SSL/TLS RUN ls -l /opt/kibana This example is similar to how docker run -e works. It shows the directory structure of running container. 0. There are also useful built-in build arguments, such as: BUILDKIT_CONTEXT_KEEP_GIT_DIR=<bool>: trigger git context to keep the . 12 && nvm alias default 0. version: '3' services: web: build: context: . . FROM ubuntu:latest RUN cd /tmp && echo "sample text" > data. Docker Debug requires a Pro, Team, or Business subcription. 99. dockerignore; Dockerfile; compose. After that, I imported this file and used my variable in another RUN command. Aug 28, 2019 · A Dockerfile is a text file that contains all the commands a user could run on the command line to create an image. fail FROM busybox RUN exit 1 RUN echo still running $ docker build -f df. I'm using Docker Desktop for Windows. 072 kB. When you execute docker run, the container process that runs is isolated in that it has its own file system, its own networking, and its own isolated process tree separate from the host. - which will do the gradle build; run docker container run -d -p 8080:8080 pokerstats; The user will clone my project from github - I then want them to be able to run the docker container without having to build the project with gradle first - I. With Docker Debug, you can debug your images while they contain the bare minimum to run your application. (eg: cd /path/to/test. list -it --rm -p 8080:80 imagename The reason this is the case is because the docker run command has the below signature. Start an app container. The result of this Dockerfile is that second and third lines are considered a single instruction: FROM microsoft/nanoserver COPY testfile. /tmp. ps1 to run with powershell if your Sep 15, 2014 · Normally, docker containers are run using the user root. sh(shell script) file inside Dockerfile. 12 and make it executable: chmod +x script. $ runlike 1dfff2ba0226 docker run --name=elated_cray -t ubuntu bash Github repository: runlike. Dockerfile # use entrypoint instead of CMD and do not specify any arguments ENTRYPOINT node server. 168. 2. May 29, 2016 · One may build an image from a docker file with docker build <dockerfile> Container You can create new containers with an image. Docker Desktop provides the docker init CLI command. py migrate" , which will create the Mar 19, 2024 · Here, we added the commands on separate lines. Command line access. Jan 7, 2019 · I define the DOCKER_HOST arg in an . Each container has a file-snapshot which is based on the file-snapshot created by the image. -d -it is the command for daemon (running tasks in the background) and interactive terminal (giving us a way to interact with the Apr 9, 2020 · run docker build -t pokerstats . Feb 13, 2015 · TL;DR; $ docker run --entrypoint /bin/sh image_name -c "command1 && command2 && command3" A concern regarding the accepted answer is below. In this specific example, your intuition is correct - the series of commands there extracts files to specific locations. You can execute RUN several times to complete your file Feb 2, 2016 · There's always an option to insert some meaningless and cheap-to-run command before the region you want to disable cache for. If you want to publish an image, create a Docker Hub account. at the end of the docker build command tells Docker that it should look for the Dockerfile in the current directory. But a subsequent RUN ls /samedirectory command in its own RUN instruction lists the same files which I just deleted in the previous RUN instruction. In other words, Docker will invalidate the cache for this layer. However, there are situations where we may need to run multiple commands in a single docker run command. Image name feels like an option but it is a parameter to the run Jul 11, 2024 · Prerequisites. /result) For something cleaner, you can use also the following gist which provides a small CLI called envstore. docker run c:/pathtodockerfile First, the command passed by run overrides the command defined in the service configuration. c file. ; Set environment variables used by the flask command. yaml file: version: '2. So far I pushed it to my github and from there to my docker hub. 1- go to your Python script directory and create a file with this title without any extension. COPY test. 15 0. 13 syntax is still supported. Using /tmp makes sense since the container will be removed after the command executes due to the --rm flag. 1 is a flask file and one is a file with a few functions. Thus there are two questions: Where is the output of all the RUN commands in a Dockerfile? Examples Attach to and detach from a running container. If you need more than 2 options for a variable (or argument) you should use another strategy. Run docker init in your project directory to be walked through the creation of the following files with sensible defaults for your project:. env file I set DOCKER_HOST=192. sh)which is already inside container from the above given shell script. May 12, 2017 · I have 2 files that depend on each other when docker is start up. Dockerfile. CMD command. Apr 16, 2023 · $ sudo pip install runlike # run the ubuntu image $ docker run -ti ubuntu bash $ docker ps -a # suppose you get the container ID 1dfff2ba0226 # Run runlike to get the docker run command. , 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. You can see that the options come before the image name. yml files, we just reference a env_file, and Docker parses it for the variables to set. Docker Debug is a CLI command that helps you follow best practices by keeping your images small and secure. The file or directory is referenced by its absolute path on the host machine. bat file (to run with cmd, or you can make a . See documentation, this command allows you to, well, copy the file from host into your image into specified path. Oct 11, 2018 · And remove the volume parameter from the docker-compose file. I was just going through this tutorial on Youtube, trying to understand the use of the -v option at the run command. run: This is a subcommand of docker. :/tmp -w /tmp node /usr/local/bin/npm install . – Mar 23, 2021 · Docker execute RUN command when you build the image. txt. This is because each RUN line adds a layer to the image, the output is quite literally the filesystem changes that you could view with docker diff on the temporary container it creates. This page details how to use the docker run command to run containers. Jan 6, 2020 · My script file looks like: #!bin/bash docker run -t -i -p 5902:5902 --name "mycontainer" --privileged myImage:new /bin/bash Running this script file will run the container in a newly invoked bash. So run should be working as well, right? Also, there are services in the project, that are up all the time. Docker execute ENTRYPOINT command when you start the container. Let's recap. docker run -it -d my_docker Is it possible to pass arguments from command line and use it Nov 29, 2016 · I'm trying to automate a creation of a development Docker image using docker build command with appropriate Dockerfile. g. Dec 6, 2019 · docker-build-and-run. – The . Just put the contents into a file and ADD/COPY it. I should also point out I'm using docker machine from a windows host - this configures . In this tutorial, we’ll discuss how to run multiple commands on the startup of a Docker container. Updates： Run without installing (Thanks @tilo) docker run Jun 27, 2018 · would RUN mkdir -p ~/new_folder work? how do I use the working dir name to run docker commands in the docker file now? – Charlie Parker. When docker starts, only the functions file will be executed but it imports flask variables from the flask file. /www/python /code WORKDIR /code RUN pip install -r requirements. RUN command_1 ENV FOO bar RUN command_2 into. sh ENTRYPOINT ["/script. bash_profile to make it available in the Terminal. Under the hood, docker run command is an alias to docker container run. If you specify the -L option, docker cp follows any symbolic link in the SRC_PATH. We can see that the intention is to write “sample text” to the /tmp/data. 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 use 0. Next, run the docker command below to ensure the installation is correct. you can drill down to your directory from gui, and open the file content. To run a Docker container, invoke the run command to create a writeable container layer over the Docker image (demo). Everything is the same except for the command instruction. In case you provide a command with the Docker run command, the CMD arguments get ignored from You'll notice that Docker Compose created the volume as well as a network. When you run docker-compose up then you are going to build image for web. Dec 15, 2023 · By default, the docker run command only executes a single command in the container. Let’s create a pretty simple docker-compose. Docker installed. py makemigrations && python manage. One of the scripts that I need to run in a RUN command wants the user to click through and read their license agreement. Feb 7, 2019 · There are a few options, depending on your exact use case: 1. dockerfile: Dockerfile # The name of your docker file container_name: phpx ports: - "80:80" Jan 24, 2023 · Run Docker Image: In the end, you can run the docker image just to be sure that the image built is working fine. If Dockerfile has more than one CMD instruction, all but last CMD instructions are ignored. 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