osm2pgsql cannot connect to postgis database, running on a Bitnami project installer

Based on this guide I am trying to import an .osm.pbf file into my PostGIS database, which is running on my Postgres Bitnami installation here:

[bitnami@ip-xxx]/usr/share/proj$ which postgres 
/opt/bitnami/postgresql/bin/postgres

but I am getting an error, where osm2pgsql seems unable to connect to my database:

[bitnami@xxx]/home/.../geoserver_data/OSM$ osm2pgsql -E 900913 -d geodb -U geouser -W -S /usr/share/osm2pgsql/default.style washington-latest.osm.pbf
osm2pgsql SVN version 0.82.0 (64bit id space)

Password:
Error: Connection to database failed: could not connect to server: No such file or directory
        Is the server running locally and accepting
        connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

Yet my Postgres install is listening to port 5432 under /opt/bitnami/postgresql/.s.PGSQL.5432 as follows:

[bitnami@ip-xxx]/home/.../postgresql/share$ sudo netstat -nlp | grep 5432 tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 13969/postgres

unix 2 [ ACC ] STREAM LISTENING 1876491 13969/postgres /opt/bitnami/postgresql/.s.PGSQL.5432

It seems that osm2pgsql is having trouble finding my database. I know that I have my postgres server running, as shown here:

[bitnami@ip-xxx]/usr/share/proj$ ps aux | grep postgres
postgres   982  0.0  0.0 247712   468 ?        S    Oct21   0:17 /usr/lib/postgresql/9.3/bin/postgres -D /var/lib/postgresql/9.3/main -c config_file=/etc/postgresql/9.3/main/postgresql.conf
postgres   986  0.0  0.6 247856  7028 ?        Ss   Oct21   0:00 postgres: checkpointer process                                                                                              
postgres   987  0.0  0.0 247712   140 ?        Ss   Oct21   0:14 postgres: writer process                                                                                                    
postgres   988  0.0  0.0 247712   104 ?        Ss   Oct21   0:12 postgres: wal writer process                                                                                                
postgres   989  0.0  0.1 248568  1088 ?        Ss   Oct21   0:12 postgres: autovacuum launcher process                                                                                       
postgres   990  0.0  0.0 103520   536 ?        Ss   Oct21   0:22 postgres: stats collector process                                                                                           
postgres 11111  0.0  1.1 171996 11876 ?        S    04:28   0:00 /opt/bitnami/postgresql/bin/postgres -D /opt/bitnami/postgresql/data
postgres 11113  0.0  0.0 171996   876 ?        Ss   04:28   0:00 postgres: checkpointer process                                      
postgres 11114  0.0  0.1 171996  1696 ?        Ss   04:28   0:00 postgres: writer process                                            
postgres 11115  0.0  0.0 171996   932 ?        Ss   04:28   0:00 postgres: wal writer process                                        
postgres 11116  0.0  0.2 172844  2084 ?        Ss   04:28   0:00 postgres: autovacuum launcher process                               
postgres 11117  0.0  0.1  27812  1120 ?        Ss   04:28   0:00 postgres: stats collector process                                   
bitnami  13358  0.0  0.0  11752   924 pts/6    S+   09:10   0:00 grep --color=auto postgres
root     26079  0.0  0.0  64536    32 pts/7    S    Nov26   0:00 su postgres
postgres 26080  0.0  0.0  21100   200 pts/7    S    Nov26   0:00 bash

I also have the following under my /etc/postgresql/9.3/main/pg_hba.conf, /opt/bitnami/postgres/share/pg_hba.conf and my /opt/bitnami/postgres/data/pg_hba.conf, which seems like is should allow access for my geouser:

# TYPE  DATABASE        USER            ADDRESS                 METHOD
local   geodb           geouser                                 md5

Any suggestions about how I can import my OSM data?