Hi Michael,
You sound like you need to setup your network. During Installing linux, did you assign your system an IP address, subnet mask, and gateway address? Did you enter the computer that acts as your domain name server? You can also include the IP address of other computers in your network, along with their NetBios names, so your linux computer can ping all other computer in you local network. Can you ping other computers from your linux computer? All this can be easily done with a GUI form with four tabs that hangs off your menu.
Also, you may need to check your /var/lib/pgsql/data/postgresql.conf file. The path just used is based on RedHat Linux 7.3 and 8.0 which I'm running in my network. Edit your postgresql.conf file and change the tcpip line to "tcpip_socket = true".
When looking for files you can use the locate cammand like:
locate postgresql.conf
Once this is done, you should be able to connect to your postgres database from other computers in you locale network. If you have a static IP address assinged to your linux computer from a ISP that is networked into the internet, you will be able to connect to postgres from any other computer connected into the internet.
Whenever you want to test changes made to postgres, you can restart it like:
service postgresql restart
In will allow postgres to reread all its setting without need to reboot your Linux computer.
LelandJ