What are the commands to check database security in PostgreSQL?

Question

I am looking for PostgreSQL commands that would help me understand what are the current database security measures implemented in my database?

e.g. I have found this one select * from pg_catalog.pg_roles; When used in DBeaver, the command basically shows all the roles that currently exist in my database and shows them in the table, the screenshot below. However, I am not sure what [v], [], or [NULL] values mean in this context. Your advice is appreciated on this matter as well.

Answer 1

change your port to anything else example:

log.Fatal(app.Listen(":80"))

as a default http application. or

log.Fatal(app.Listen(":8000"))

if you want.

You cannot use a port that another application is using.