/usr/lib/radare/bin/elf-quad-word-shell is in radare-common 1:1.5.2-4.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | #!/bin/sh
#
# Radare is also shell-friendly :)
#
echo "!printf \"This is an elf quad word: \"
vW
s 0
!printf \"In ascii: \"
vs
q" | radare -v /bin/ls
|