/usr/share/doc/dialog/examples/msgbox is in dialog 1.1-20120215-2.
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 | #!/bin/sh
# $Id: msgbox,v 1.7 2010/01/13 10:35:13 tom Exp $
. ./setup-vars
$DIALOG --title "MESSAGE BOX" --clear "$@" \
--msgbox "Hi, this is a simple message box. You can use this to \
display any message you like. The box will remain until \
you press the ENTER key." 10 41
retval=$?
. ./report-button
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