This file is indexed.

/usr/sbin/login.radius is in libradiusclient-ng-dev 0.5.6-1.1ubuntu2.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh
#
# $Id: login.radius,v 1.1.1.1 2003/12/02 10:39:23 sobomax Exp $
#
# Copyright (C) 1998 Lars Fenneberg
#
# See the file COPYRIGHT for the respective terms and conditions. 
# If the file is missing contact me at lf@elemental.net 
# and I'll send you a copy.
#

cat <<EOF
This is the dummy login.radius script. If you want that this script
does something useful you'll have to replace it.

The following RADIUS environment variables are set:
EOF

set | egrep '^RADIUS_'

echo
echo "Bye, bye."

exit 0