Howto disable Postgres listening on TCP? Simply to avoid many problems in the first place I do not want my postgres server program to accept/listen to anything from any network (i.e. TCP/IP 4/6) connections.
My setup is a Postgres 9.1 on an Ubuntu 12.04 box and I thought tweeking /etc/postgresql/9.1/main/pg_hba.conf to not include those lines which commented out (see below) would cause postgres to &quot;please not listen on network TCP/IP devices&quot;

local   all             postgres        trust

# TYPE  DATABASE        USER            ADDRESS                 METHOD
# "local" is for Unix domain socket connections only
#local   all             all                                     md5
# IPv4 local connections:
#host    all             all             127.0.0.1/32            md5
# IPv6 local connections:
#host    all             all             ::1/128                 md5


Also I know that there is the -i command line to start the postgres server with if we YES want to listen on TCP/IP . I actually seek for the opposite thing a -??? meaning NO please do NOT listen on TCP/IP.
I used a netstat -utap | grep post  and it shows that postgres besides my settings in /etc/postgresql/9.1/main/pg_hba.conf is still listening on  TCP/IP.
QUESTION
What did I do wrong here? How can I shut off this TCP/IP listening attitude of my Postgres server?
Having only unix socket listening I am happy to the max ;)
Thank you
Addition: I also perceive that postgres establishes a UDP connection to this 127.0.0.1:38860, what would this be about?
Maybe it is not the finest Solution / Answer to my question, but at least it will point anybody (facing the said challenge I had in my original question)

To disable listening on TCP/IP network I used this command line option when starting the server application:

postgres [other arguments] -c listen_addresses=''

Addition:
The remaining open udp 127.0.0.1:38860 connection is supposedly linked to the 
purpose of the the statistics collector subprocess as suggested on postgresql.org