Variable: tramp-default-remote-shell
tramp-default-remote-shell is a variable defined in tramp-sh.el.gz.
Value
"/bin/sh"
Documentation
The default remote shell Tramp applies.
Source Code
;; Defined in /usr/src/emacs/lisp/net/tramp-sh.el.gz
;;;###tramp-autoload
(defconst tramp-default-remote-shell "/bin/sh"
"The default remote shell Tramp applies.")