Docker How to use bash with an Alpine based docker image

Question

I created a docker image from openjdk 8-jdk-alpine but when I try to execute simple commands I get the following errors   RUN bash  bin sh  bash  not found  RUN   gradlew build env  can t execute  bash   No such file or directory

User · Answer

RUN  bin sh -c  apk add --no-cache bash    worked for me

User · Answer

Alpine docker image doesn t have bash installed by default  You will need to add following commands to get bash   RUN apk update  amp  amp  apk add bash   If youre using Alpine 3 3  then you can just do  RUN apk add --no-cache bash   to keep docker image size small   Thanks to comment from  sprkysnrky

User · Answer

Try using RUN  bin sh instead of bash

User · Answer

To Install bash you can do   RUN apk add --update bash  amp  amp  rm -rf  var cache apk     If you do not want to add extra size to your image  you can use ash or sh that ships with alpine   Reference  https   github com smebberson docker-alpine issues 43

[bash] Docker: How to use bash with an Alpine based docker image?

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