/etc/emacs/site-start.el is in emacsen-common 1.4.22ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | ;; Emacsen independent startup file. All of the various installed
;; flavors of emacs (emacs 19, emacs 20, xemacs) will load this file
;; at startup. Make sure any code you put here is emacs flavor
;; independent.
;; Package maintainers: do not have Debian packages edit this file.
;; See the policy manual for the proper way to handle Emacs package
;; initialization code.
|