The pg_hba.conf File

i_am_birdman

PostgreSQL 9.1devel Documentation:
http://developer.postgresql.org/pgdocs/postgres/auth-pg-hba-conf.html
example:
http://defindit.com/readme_files/postgres_utilities.html



after you edited pg_hba.conf,you should do  as follows:
su postgres
pg_ctl restart  -D /opt/Postgres/9.0/data/