PostgreSQL: could not connect to server: Connection refused

Question

I have a Django project, I want to switch from SQLite to PostgreSQL .

After installation, I can't run the command psql

Here is the traceback:

psql: could not connect to server: Connection refused (0x0000274D/10061)
    Is the server running on host "localhost" (::1) and accepting
    TCP/IP connections on port 5432?
could not connect to server: Connection refused (0x0000274D/10061)
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port 5432?

OS: Windows

Answer 1

TCP/IP connections are not enabled by default, so you probably have to edit a file called postgres.conf:

  vi /etc/postgresql/9.4/main/postgresql.conf

For you it may reside in a different location. Look for a line saying:

  #listen_addresses = ''        # what IP address(es) to listen on;

Change it to this:

  listen_addresses = '*'        # what IP address(es) to listen on;

Right under this there's the port setting. For me it reads:

  port = 5432               # (change requires restart)

Higher up in the same file there is a reference to another config file:

  hba_file = '/etc/postgresql/9.4/main/pg_hba.conf' # host-based authentication file

Go ahead and edit that file. You should insert a line like this:

  host all all 192.168.1.0 255.255.255.0 trust

Your IP may be different. (Once you ensure this is working, you can change "trust" to "md5" for better security.) After doing this, you need to restart the postgres server.

  /usr/lib/postgresql/9.4/bin/pg_ctl restart