"nginx -v" outputs is in stderr.

[Maxim Dounin]

Hello!

On Wed, Feb 17, 2016 at 05:07:12PM +0900, Takahiro Kujirai wrote:

> This is Takahiro Kujirai.
> 
> When I typed "nginx -v > /tmp/nginx.txt"  on nginx 1.9.11, I found output
> is in stderr.

[...]

> I think "stdout" is good, not "stderr", is this the design?

Yes, this is by design.
See https://trac.nginx.org/nginx/ticket/592 for more details.

-- 
Maxim Dounin
http://nginx.org/