I use emacs in terminal, hence title bar is not available, How do I see full file path or at least last 2 directories of file.
I got the answer from https://emacs.stackexchange.com/questions/2338/how-can-i-display-the-parent-directory-of-the-current-file-in-the-modeline post
Basically I added this
(setq-default mode-line-buffer-identification
(let ((orig (car mode-line-buffer-identification)))
`(:eval (cons (concat ,orig (abbreviate-file-name default-directory))
(cdr mode-line-buffer-identification)))))