/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/ is in linux-azure-headers-4.15.0-1036 4.15.0-1036.38~14.04.2.
This file is owned by root:root, with mode 0o755.
..
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/Makefile
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/lwt_len_hist.sh
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/run_cookie_uid_helper_example.sh
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/tc_l2_redirect.sh
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/test_cgrp2_sock.sh
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/test_cgrp2_sock2.sh
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/test_cgrp2_tc.sh
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/test_cls_bpf.sh
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/test_ipip.sh
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/test_lwt_bpf.sh
/usr/src/linux-azure-headers-4.15.0-1036/samples/bpf/test_tunnel_bpf.sh