docker: executable file not found in $PATH

This was the first result on google when I pasted my error message, and it's because my arguments were out of order.

The container name has to be after all of the arguments.

Bad:

docker run <container_name> -v $(pwd):/src -it

Good:

docker run -v $(pwd):/src -it <container_name>

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When you use the exec format for a command (e.g., CMD ["grunt"], a JSON array with double quotes), it will be executed without a shell. This means that most environment variables will not be present.

If you specify your command as a regular string (e.g. CMD grunt) then the string after CMD will be executed with /bin/sh -c.

More info on this is available in the CMD section of the Dockerfile reference.

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I found the same problem. I did the following:

docker run -ti devops -v /tmp:/tmp /bin/bash

When I change it to

docker run -ti -v /tmp:/tmp devops /bin/bash

it works fine.

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There are several possible reasons for an error like this.

In my case, it was due to the executable file (docker-entrypoint.sh from the Ghost blog Dockerfile) lacking the executable file mode after I'd downloaded it.

Solution: chmod +x docker-entrypoint.sh

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For some reason, I get that error unless I add the "bash" clarifier. Even adding "#!/bin/bash" to the top of my entrypoint file didn't help.

ENTRYPOINT [ "bash", "entrypoint.sh" ]

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A Docker container might be built without a shell (e.g. https://github.com/fluent/fluent-bit-docker-image/issues/19).

In this case, you can copy-in a statically compiled shell and execute it, e.g.

docker create --name temp-busybox busybox:1.31.0
docker cp temp-busybox:/bin/busybox busybox
docker cp busybox mycontainerid:/busybox
docker exec -it mycontainerid /bin/busybox sh

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I had the same problem, After lots of googling, I couldn't find out how to fix it.

Suddenly I noticed my stupid mistake :)

As mentioned in the docs, the last part of docker run is the command you want to run and its arguments after loading up the container.

NOT THE CONTAINER NAME !!!

That was my embarrassing mistake.

Below I provided you with the picture of my command line to see what I have done wrong.

And this is the fix as mentioned in the docs.

https://i.stack.imgur.com/uNQQ2.jpg

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In the error message shown:

Error response from daemon: Cannot start container foo_1: \ exec: "grunt serve": executable file not found in $PATH

It is complaining that it cannot find the executable grunt serve, not that it could not find the executable grunt with the argument serve. The most likely explanation for that specific error is running the command with the json syntax:

[ "grunt serve" ]

in something like your compose file. That's invalid since the json syntax requires you to split up each parameter that would normally be split by the shell on each space for you. E.g.:

[ "grunt", "serve" ]

The other possible way you can get both of those into a single parameter is if you were to quote them into a single arg in your docker run command, e.g.

docker run your_image_name "grunt serve"

and in that case, you need to remove the quotes so it gets passed as separate args to the run command:

docker run your_image_name grunt serve

For others seeing this, the executable file not found means that Linux does not see the binary you are trying to run inside your container with the default $PATH value. That could mean lots of possible causes, here are a few:

Did you remember to include the binary inside your image? If you run a multi-stage image, make sure that binary install is run in the final stage. Run your image with an interactive shell and verify it exists: docker run -it --rm your_image_name /bin/sh

Your path when shelling into the container may be modified for the interactive shell, particularly if you use bash, so you may need to specify the full path to the binary inside the container, or you may need to update the path in your Dockerfile with: ENV PATH=$PATH:/custom/dir/bin

The binary may not have execute bits set on it, so you may need to make it executable. Do that with chmod: RUN chmod 755 /custom/dir/bin/executable

The binary may include dynamically linked libraries that do not exist inside the image. You can use ldd to see the list of dynamically linked libraries. A common reason for this is compiling with glibc (most Linux environments) and running with musl (provided by Alpine): ldd /path/to/executable

If you run the image with a volume, that volume can overlay the directory where the executable exists in your image. Volumes do not merge with the image, they get mounted in the filesystem tree same as any other Linux filesystem mount. That means files from the parent filesystem at the mount point are no longer visible. (Note that named volumes are initialized by docker from the image content, but this only happens when the named volume is empty.) So the fix is to not mount volumes on top of paths where you have executables you want to run from the image.

If you run a binary for a different platform, and haven't configured binfmt_misc with the --fix-binary option, qemu will be looking for the interpreter inside the container filesystem namespace instead of the host filesystem. See this Ubuntu bug report for more details on this issue.

If the error is from a shell script, the issue is often with the first line of that script (e.g. the #!/bin/bash). Either the command doesn't exist inside the image for a reason above, or the file is not saved as ascii or utf8 with Linux linefeeds. You can attempt dos2unix to fix the linefeeds, or check your git and editor settings.

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problem is glibc, which is not part of apline base iamge.

After adding it worked for me :)

Here are the steps to get the glibc

apk --no-cache add ca-certificates wget
wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub
wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.28-r0/glibc-2.28-r0.apk
apk add glibc-2.28-r0.apk

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I got this error message, when I was building alpine base image :

ERROR: for web  Cannot start service web: OCI runtime create failed: container_linux.go:380: starting container process caused: exec: "bash": executable file not found in $PATH: unknown

In my docker-compose file, I had the command directive in which executing command using bash and bash does not come with alpine base image.

command: bash -c "python manage.py runserver 0.0.0.0:8000"

Then I realized and executed command using sh (shell). It worked for me.

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Refering to the title.

My mistake was to put variables via --env-file during docker run. Among others the file consisted of a PATH extension: PATH=$PATH:something, which caused PATH var look literally like PATH=$PATH:something (var resolution hadn't been performed) instead of PATH:/usr/bin...:something.

I couldn't make the resolution work through --env-file, so the only way I see this working is by using ENV in Dockerfile.

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I ran into this issue using docker-compose. None of the solutions here or on this related question resolved my issue. Ultimately what worked for me was clearing all cached docker artifacts with docker prune -a and restarting docker.

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to make it work add soft reference to /usr/bin:

ln -s $(which node) /usr/bin/node

ln -s $(which npm) /usr/bin/npm

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