liuxunorg opened a new pull request #3359: [ZEPPELIN-4131] Refactoring shell interpreter URL: https://github.com/apache/zeppelin/pull/3359 ### What is this PR for? Realize the same function as the terminal, The shell-by-command can be executed by the shell interpreter. [Refactoring zeppelin shell interpreter Design Document](https://docs.google.com/document/d/1-XUkXY06cMtEUBxVHVyqQPkyCkv2BjYhAQj-W1CBxNI/edit) ### What type of PR is it? [Improvement] ### What is the Jira issue? * https://issues.apache.org/jira/browse/ZEPPELIN-4131 ### How should this be tested? * [CI Pass](https://travis-ci.org/liuxunorg/zeppelin/builds/531594343) ### Screenshots (if appropriate)  ### Questions: * Does the licenses files need update? NO * Is there breaking changes for older versions? NO * Does this needs documentation? YES
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