Reproduce: `xdg-open` doesn't work in Ubuntu for `counsel-locate-action-extern`

init.el

(require 'package)
(setq package-enable-at-startup nil)
(add-to-list 'package-archives
             '("melpa" . "https://melpa.org/packages/"))
(package-initialize)

(unless (package-installed-p 'use-package)
  (package-refresh-contents)
  (package-install 'use-package))
(eval-when-compile
  (require 'use-package))

;; Start Test
(use-package counsel
  :ensure t
  :config
  (ivy-mode 1))