[ https://issues.apache.org/jira/browse/HADOOP-7214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017017#comment-13017017 ] 

Tsz Wo (Nicholas), SZE commented on HADOOP-7214:
------------------------------------------------

Thanks Aaron.  According to the current convention, I think the usage string probably should be
{code}
GROUPS_USAGE="-groups [<username...>]";
{code}
What do you think?

> Hadoop /usr/bin/groups equivalent
> ---------------------------------
>
>                 Key: HADOOP-7214
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7214
>             Project: Hadoop Common
>          Issue Type: New Feature
>    Affects Versions: 0.23.0
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>         Attachments: hadoop-7214.0.txt, hadoop-7214.1.txt
>
>
> Since user -> groups resolution is done on the NN and JT machines, there should be a way for users to determine what groups they're a member of from the NN's and JT's perspective.

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