This file is indexed.

/usr/sbin/gss_destroy_creds is in nfs-common 1:1.2.5-3ubuntu3.

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/bash

path=`mount|grep rpc_pipefs|awk '{ print $3;exit }'`

if [ -z "$path" ]; then
	echo "unable to find rpc_pipefs; is it mounted?"
	exit 1
fi;

find "$path" -name 'krb5' -exec gss_clnt_send_err '{}' $* ';'