+# make it the root because pxe-kexec only looks there.
+# It wouldn't be too hard to change if we needed.
+# We could also just dump things in /srv/tftp, but fai
+# has some defaults, which I don't even use, which expect
+# the other directory, so it's kind of a tossup, whatever.
+# This means fai's example isc-dhcp-server filename directory should remove the fai/ prefix.
+sed -ri 's,^ *(TFTP_DIRECTORY=).*,\1"/srv/tftp/fai",' /etc/default/tftpd-hpa
+systemctl restart tftpd-hpa
+