How to connect superset to postgresql - The port is closed

Sardar 0
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My operating system is Linux.
I am going to connect Superset to PostgreSQL.
PostgreSQL port is open and its value is 5432.
PostgreSQL is also running and not closed.
Unfortunately, after a day of research on the Internet, I could not solve the problem and it gives the following error: 

The port is closed.

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Database port:
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command: lsof -i TCP:5432 
python3 13127 user   13u  IPv4 279806      0t0  TCP localhost:40166->localhost:postgresql (ESTABLISHED)
python3 13127 user   14u  IPv4 274261      0t0  TCP localhost:38814->localhost:postgresql (ESTABLISHED)

Please help me, I am a beginner, but I searched a lot and did not get any results.

apache-superset database postgresql
1 Answers

From the configuration file, you set port 5432, but it does not mean that your pg service is available

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