Re: ${!var} In Scripts

[Allen Wittenauer]

> On Mar 1, 2019, at 3:04 PM, Daniel Templeton <templ...@apache.org> wrote:
> 
> There are a bunch of uses of the bash syntax, "${!var}", in the Hadoop 
> scripts.  Can anyone explain to me what that syntax was supposed to achieve? 


#!/usr/bin/env bash

j="hi"
m="bye"
k=j
echo ${!k}
k=m
echo ${!k}
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