Message-ID: <1515575458.2848.24.camel@cybertec.at>
Subject: Re: Unable to connect Postgres using psql while postgres is already
 running.
From: Laurenz Albe <laurenz.albe@cybertec.at>
To: Dinesh Chandra 12108 <Dinesh.Chandra@cyient.com>,
	"pgsql-performance@postgresql.org"
	 <pgsql-performance@postgresql.org>
Date: Wed, 10 Jan 2018 10:10:58 +0100
In-Reply-To: <78c05a653d2f4c32aa324daac84ed5ec@cyient.com>
References: <78c05a653d2f4c32aa324daac84ed5ec@cyient.com>
Organization: Cybertec
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Dinesh Chandra 12108 wrote:
> After restarting PostgreSQL Server, I am unable to connect postgres from putty, I am getting error
>  
> psql: could not connect to server: No such file or directory
>     Is the server running locally and accepting
>     connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
>  
> While postgres is already running and also I am able to connect databases from PGAdmin tool but not from command prompt.

You know that a local connection only works when you are logged in
on the database machine, right?

Is your database listening on port 5432?

Connect as user "postgres" and run the following queries:

   SHOW port;
   SHOW unix_socket_directories;

That will show the port and the directories where UNIX sockets are created.

You can use a socket directory name with the -h option of psql.

Yours,
Laurenz Albe