This file is indexed.

/sbin/ldconfig is in libc-bin 2.27-3ubuntu1.

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

if  test $# = 0							\
    && test x"$LDCONFIG_NOTRIGGER" = x				\
 && test x"$DPKG_MAINTSCRIPT_PACKAGE" != x			\
 && dpkg-trigger --check-supported 2>/dev/null
then
	if dpkg-trigger --no-await ldconfig; then
		if test x"$LDCONFIG_TRIGGER_DEBUG" != x; then
			echo "ldconfig: wrapper deferring update (trigger activated)"
		fi
		exit 0
	fi	
fi

exec /sbin/ldconfig.real "$@"