Trusty sudo postgresql listening on port 5433, can't resolve why

You can edit the config file, then restart the server.

before_install:
  - sudo service postgresql stop
  - sed -e 's/^port.*/port = 5432/' /etc/postgresql/10/main/postgresql.conf > postgresql.conf
  - sudo chown postgres postgresql.conf
  - sudo mv postgresql.conf /etc/postgresql/10/main
  - sudo service postgresql start 10
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