>"The easiest way to get started with command-line editing is to use the Emacs mode, even if you use another editor. This is also the default style on most shells. The reason is that this seems more of a natural mode, since Emacs doesn't distinguish between command and insert modes the way Vi and Vim do."
This GitHub repository contains bash-completion.el, a script that adds programmable bash completion to Emacs shell-mode. It is based on bash completion and is aware of bash builtins, aliases, and functions. It supports file expansion inside colon-separated variables and after redirections (> or <), escapes special characters when expanding file names, and is configurable through programmable bash completion. It works on remote shells, through TRAMP.
(eval-after-load 'comint
'(progn
(define-key comint-mode-map (kbd "<up>")
#'comint-previous-matching-input-from-input)
(define-key comint-mode-map (kbd "<down>")
#'comint-next-matching-input-from-input)))
'(progn
(define-key comint-mode-map (kbd "<up>")
#'comint-previous-matching-input-from-input)
(define-key comint-mode-map (kbd "<down>")
#'comint-next-matching-input-from-input)))
