How can you split a long RUN instruction on multiple lines in Dockerfile?
Experience Level: Senior
Tags: Docker
Answer
In the shell form you can use a \ (backslash) to continue a single RUN instruction onto the next line. For example, consider these two lines:
RUN /bin/bash -c 'source $HOME/.bashrc; \
echo $HOME'
Together they are equivalent to this single line:
RUN /bin/bash -c 'source $HOME/.bashrc; echo $HOME'
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