This file is indexed.

/etc/xinetd.d/echo is in xinetd 1:2.3.15-3ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# default: off
# description: An xinetd internal service which echo's characters back to
# clients.
# This is the tcp version.
service echo
{
	disable		= yes
	type		= INTERNAL
	id		= echo-stream
	socket_type	= stream
	protocol	= tcp
	user		= root
	wait		= no
}

# This is the udp version.
service echo
{
	disable		= yes
	type		= INTERNAL
	id		= echo-dgram
	socket_type	= dgram
	protocol	= udp
	user		= root
	wait		= yes
}