This file is indexed.

/usr/lib/radare/bin/net-udp is in radare-common 1:1.5.2-6.

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
#; This UDP header can be aligned where you want becouse it is relative :)
#; author: sha0

cat <<EOF
s here
b 16
f udp.sourceport

s +16
b 16
f udp.destport

s here
b 16
f udp.length

s +16
b 16
f udp.chksum

s +16
b 64
f udp.data
EOF