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https://issues.apache.org/jira/browse/HADOOP-672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12481884
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Wendy Chien commented on HADOOP-672:
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1) It was intentional. It prints all the help info if you ask about anything
other than a valid command. Alternatively, you can change it to have help
report back the command doesn't exist in that case, and only have it print all
the help if you just say '-help'.
> dfs shell enhancements
> ----------------------
>
> Key: HADOOP-672
> URL: https://issues.apache.org/jira/browse/HADOOP-672
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Reporter: Yoram Arnon
> Assigned To: dhruba borthakur
> Priority: Minor
> Attachments: fsshellHelp2.patch, hadoop-672.patch
>
>
> A few enhancements to dfsshell:
> Bring the wiki page up to date with the latest functionality if that's not
> done already.
> Add a -help option to the command.
> Make the syntax line more helpful in identifying which argument to each
> command needs to
> be a directory, a file or a glob.
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