FATAL: could not load pg_hba.conf

jalal@klein:~/Downloads$ sudo -u postgres /usr/lib/postgresql/9.4/bin/pg_ctl -D /etc/postgresql/9.4/main/ start
server starting
jalal@klein:~/Downloads$ 2016-09-08 13:14:32 CDT [5212-1] LOG:  invalid authentication method "localhost"
2016-09-08 13:14:32 CDT [5212-2] CONTEXT:  line 85 of configuration file "/etc/postgresql/9.4/main/pg_hba.conf"
2016-09-08 13:14:32 CDT [5212-3] FATAL:  could not load pg_hba.conf