/usr/bin/grass64 is in grass-core 6.4.4-1.
This file is owned by root:root, with mode 0o755.
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 | #! /bin/sh
#############################################################################
#
# MODULE: GRASS Initialization
# AUTHOR(S): Justin Hickey - Thailand - jhickey@hpcc.nectec.or.th
# PURPOSE: The source file for this shell script is in
# lib/init/grass.src and is the grass startup script. It
# requires a source file because the definition of GISBASE
# is not known until compile time and is substituted from the
# Makefile. Any command line options are passed to Init.sh.
# COPYRIGHT: (C) 2000-2005 by the GRASS Development Team
#
# This program is free software under the GNU General Public
# License (>=v2). Read the file COPYING that comes with GRASS
# for details.
#
#############################################################################
trap "echo 'User break!' ; exit" 2 3 9 15
# Set the GISBASE variable
GISBASE=/usr/lib/grass64
export GISBASE
exec "$GISBASE/etc/Init.sh" "$@"
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