postgresqlの設定
su postgres
createuser aaa
vi /var/lib/postgresql/7.4/main/pg_hba.conf
以下へ変更
#local all all ident sameuser
local all all trust
# IPv4-style local connections:
#host all all 127.0.0.1 255.255.255.255 md5
host all all 127.0.0.1 255.255.255.255 trust