Thank you for kind reply. I appreciate it.

2018. 1. 19. 오전 2:54에 "Glenn Morris" <rgm@gnu.org>님이 작성:

> Glenn Morris wrote:
>
> > Eshell makes process-environment buffer-local.
>
> If you repeat your experiment with
>
> emacs -Q --eval '(setq eshell-modify-global-environment t)' -f eshell
>
> it works as you wanted.
>