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How to Fix PostgreSQL Connection to Server at Localhost (::1) Port 5432 Failed Connection Refused - YouTube
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PostgreSQL: Re: Need help in establishing pgadmin4 to connect to the postgres database server when the database is listening on port 5433 (instead of port 5432)
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postgresql - psql: error: connection to server at "5.199.162.56", port 5432 failed: Connection refused - Ask Ubuntu
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