Adding bfalog.sh to tail the logfile

bin/bfalog.sh

+#!/bin/bash
+# Robert Martin-Legene <robert@nic.ar>
+
+if [ -z "${BFAHOME}" ]; then echo "\$BFAHOME not set. Did you source bfa/bin/env ?" >&2; exit 1; fi
+source ${BFAHOME}/bin/libbfa.sh || exit 1
+
+bfaconfig node
+exec tail -n 100 -F ${BFANODEDIR}/log