“psql: could not connect to server: Connection refused” Error when connecting to remote database

cd /etc/postgresql/9.x/main/

open file named postgresql.conf

sudo vi postgresql.conf

add this line to that file

listen_addresses = '*'

then open file named pg_hba.conf

sudo vi pg_hba.conf

and add this line to that file

host  all  all 0.0.0.0/0 md5

It allows access to all databases for all users with an encrypted password

restart your server

sudo /etc/init.d/postgresql restart

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