This error indicates that something is wrong with the setup of the OS on which 
you are running DevStack, or with the VM on which you are running the OS. 
Especially, if you install DevStack on a VirtualBox VM.

Google for “Error creating textual authentication agent: Error opening current 
controlling terminal for the process” and pick the result that best matches 
your situation.

Bernd

> On Jan 20, 2018, at 1:16, <xief...@sina.com> <xief...@sina.com> wrote:
> 
> Error creating textual authentication agent: Error opening current 
> controlling terminal for the process
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