This file is indexed.

/sbin/fsck.nfs is in initscripts 2.88dsf-59.3ubuntu2.

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
#
# fsck.nfs
#
# Dummy fsck.nfs file that always returns success. We
# need this for when the root file system is on NFS:
# there is no way to find out if root is NFS mounted
# and we really want to do a "fsck -a /".
#

while :
do
	case "$1" in
		-*) shift ;;
		*) break ;;
	esac
done

echo "$1: NFS file system."

exit 0