postgres@ubuntu-s-1vcpu-1gb-fra1-01:~$ psql -U postgres
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/postgresql/.s.PGSQL.5432"?
postgres@ubuntu-s-1vcpu-1gb-fra1-01:~$ service postgresql restart
Command 'service' is available in '/usr/sbin/service'
The command could not be located because '/usr/sbin' is not included in the PATH environment variable.
This is most likely caused by the lack of administrative privileges associated with your user account.
service: command not found