psql: не удалось подключиться к серверу в Ubuntu

Question

После ввода «sudo -u postgres psql» (postgresql 11, Ubuntu)

psql: could not connect to server: No such file or directory Is the server 
running locally and accepting connections on Unix domain socket 
"/var/run/posunix_socket_directories = '/var/run/postgresql' tgresql/.s.PGSQL.5432"?

Я проверил postgresql -status и увидел:

  postgresql.service - PostgreSQL RDBMS
  Loaded: loaded (/lib/systemd/system/postgresql.service; enabled; vendor prese
  Active: active (exited) since Tue 2020-06-16unix_socket_directories = '/var/run/postgresql' unix_socket_directories = '/var/run/postgresql'  18:38:41 MSK; 10min ago
  Process: 9568 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
  Main PID: 9568 (code=exited, status=0/SUCCESS)

 16 18:38:41 andrej-B360-AORUS-GAMING-3-WIFI systemd[1]: Starting PostgreSQL 
 16 18:38:41 andrej-B360-AORUS-GAMING-3-WIFI systemd[1]: Started PostgreSQL R 
unix_socket_directories = '/var/run/postgresql' 

Итак, статус успешен.

В postgresql .conf

 unix_socket_directories = '/var/run/postgresql' 

Также я перезапустил postgresql, но безуспешно ...