I just want single instance. I just use a simple .emacs for config, which has
(use-package server :ensure t :init (server-mode 1) :config (unless (server-running-p) (server-start)))
It works on MS windows. But on Linux (Ubuntu 18 LTS)/Mac OS, then 2nd instance started with warning:
*Warning (server): Unable to start the Emacs server. There is an existing Emacs server, named "server". To start the server in this Emacs process, stop the existing server or call ‘M-x server-force-delete’ to forcibly disconnect it.*
May you please give me some suggestion?
Emacs version: 26.2