Cannot execute RUN mkdir in a Dockerfile

Question

This is an error message I get when building a Docker image  Step 18   RUN mkdir  var www app  amp  amp  chown luqo33 www-data  var www app --- gt  Running in 7b5854406120 mkdir  cannot create directory   var www app   No such file or directory  This is a fragment of Dockerfile that causes the error  FROM ubuntu 14 04 RUN groupadd -r luqo33  amp  amp  useradd -r -g luqo33 luqo33   lt installing nginx  fpm  php and a couple of other things gt   RUN mkdir  var www app  amp  amp  chown luqo33 www-data  var www app VOLUME  var www app WORKDIR  var www app  mkdir  cannot create directory   var www app   No such file or directory sound so nonsensical - of course there is no such directory  I want to create it  What is wrong here

User · Answer

Apart from the previous use cases  you can also use Docker Compose to create directories in case you want to make new dummy folders on docker-compose up       volumes    -    ftp    -  ftp node modules   -  ftp files

User · Answer

The problem is that  var www doesn t exist either  and mkdir isn t recursive by default -- it expects the immediate parent directory to exist   Use   mkdir -p  var www app      or install a package that creates a  var www prior to reaching this point in your Dockerfile

User · Answer

You can also simply use   WORKDIR  var www app   It will automatically create the folders if they don t exist   Then switch back to the directory you need to be in

User · Answer

When creating subdirectories hanging off from a non-existing parent directory s  you must pass the -p flag to mkdir     Please update your Dockerfile with  RUN mkdir -p        I tested this and it s correct

[docker] Cannot execute RUN mkdir in a Dockerfile

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