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I have to overwrite a file through Dockerfile. In particular on an Ubuntu container with Apache and PHP and I have to overwrite the file php5-cgi.conf. I tried to use the following command:
COPY php5-cgi.conf /etc/apache2/conf-enabled/php5-cgi.conf but I had the error: File already exists
I have also tried to use the following command
RUN cp -f php5-cgi.conf /etc/apache2/conf-enabled/
but the file is not copied when the container is running, Is there any advice on this?
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It seems that docker build won't overwrite a file it has previously copied. I have a dockerfile with several copy instructions, and files touched in earlier COPY directives don't get overwritten by later ones. After building this, $BASE/config/thatfile. yml contains the contents of file1.
An essential feature of a CMD command is its ability to be overridden. This allows users to execute commands through the CLI to override CMD instructions within a Dockerfile. A Docker CMD instruction can be written in both Shell and Exec forms as: Exec form: CMD [“executable”, “parameter1”, “parameter2”]
Drop the file name from the destination:
COPY php5-cgi.conf /etc/apache2/conf-enabled/ The destination is an absolute path (not filename), or a path relative to the work directory, into which the source will be copied inside the destination container.
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