/usr/lib/ocaml/batteries/ocamlinit is in libbatteries-ocaml-dev 2.6.0-1build1.
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 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | (*
 * Copyright (C) 2011 Batteries Included Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version,
 * with the special exception on linking described in file LICENSE.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *)
(* This script starts loading batteries into the ocaml toplevel.
 *
 * To install, copy to your ~/.ocamlinit.  If you already have an
 * ocamlinit file that initializes findlib, just add the last
 * phrase to your ocamlinit.
 *)
(* Pretend to be in non-interactive mode to hide topfind
initialization message *)
let interactive = !Sys.interactive;;
Sys.interactive := false;;
#use "topfind";;
Sys.interactive := interactive;;
(* run battop.ml in toplevel *)
Toploop.use_silently
             Format.err_formatter (Filename.concat (Findlib.package_directory
             "batteries") "battop.ml");;
 |