could not connect to server: Connection refused Is the server running on host and accepting TCP/IP connections on port 5432?
cd /etc/postgresql/9.x/main/
------- open file named postgresql.conf
sudo nano postgresql.conf
------- add this line to that file
listen_addresses = '*'
------- then open file named pg_hba.conf
sudo nano pg_hba.conf
------- and add this line to that file
host all all 0.0.0.0/0 md5
------- restart your server
sudo /etc/init.d/postgresql restartcannot connect to daemon at tcp:5037: Connection refused
ps aux | grep 5037
kill -9 <pid of process of your incorrectly running adb>
#then
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