/usr/bin/zEscrow is in zescrow-client 1.7-0ubuntu1.
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 26 27 28 29 30 31 | #!/bin/sh
#    zEscrow - aka ecryptfs-escrow-private
#    Copyright (C) 2012 Dustin Kirkland <dustin.kirkland@gmail.com>
#    Copyright (C) 2012 Scot-Irish Lads, LLC
#    Copyright (C) 2012 Gazzang, Inc.
#
#    Authors: Dustin Kirkland <dustin.kirkland@gmail.com>
#    	      Wesley Wiedenmeier <magicalchicken@mail.magicalchicken.dnsdynamic.net>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, version 3 of the License.
#
#    This program 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 Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
# Bail immediately on errors!
set -e
if [ -n "$DISPLAY" ]; then
	# Default to the graphical utility
	exec /usr/bin/zEscrow-gui
else
	# Fall back on the command line utility
	exec /usr/bin/zEscrow-cli
fi
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