Find the host name and port using PSQL commands

问题

I have PSQL running, and am trying to get a perl application connecting to the database. Is there a command to find the current port and host that the database is running on?

回答1:

The default PostgreSQL port is 5432. The host that the database is operating on should have been provided by your hosting provider; I'd guess it would be the same host as the web server if one wasn't specified. Typically this would be configured as localhost, assuming your web server and database server are on the same host.

回答2:

SELECT *
FROM pg_settings
WHERE name = 'port';

回答3:

This command will give you postgres port number

 \conninfo

If postgres is running on Linux server, you can also use the following command

sudo netstat -plunt |grep postgres

OR (if it comes as postmaster)

sudo netstat -plunt |grep postmaster

and you will see something similar as this

tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN      140/postgres
tcp6       0      0 ::1:5432                :::*                    LISTEN      140/postgres

in this case, port number is 5432 which is also default port number

credits link

回答4:

select inet_server_addr(); gives you the ip address of the server.

回答5:

select inet_server_port(); gives you the port of the server.

回答6:

select inet_server_addr( ), inet_server_port( );

回答7:

This is non-sql method. Instructions are given on the image itself. Select the server that you want to find the info about and then follow the steps.

回答8:

The postgresql port is defined in your postgresql.conf file.

For me in Ubuntu 14.04 it is: /etc/postgresql/9.3/main/postgresql.conf

Inside there is a line:

port = 5432

Changing the number there requires restart of postgresql for it to take effect.

回答9:

You can use the command in psql \conninfo you will get You are connected to database "your_database" as user "user_name" on host "host_name" at port "port_number".

回答10:

go to the "Terminal" and just type

service postgres status

In the results you can get the port details

In my case it's running on port "5432" (default).
I'm using CentOS 7.Hope this helps.

回答11:

SELECT CURRENT_USER usr, :'HOST' host, inet_server_port() port;

This uses psql's built in HOST variable, documented here

And postgres System Information Functions, documented here

回答12:

service postgresql status

returns: 10/main (port 5432): online

I'm running Ubuntu 18.04

回答13:

From the terminal you can do:

\conninfo

I would suggest reading a documentation on their exhaustive list of all commands using:

\?

来源：https://stackoverflow.com/questions/5598517/find-the-host-name-and-port-using-psql-commands