This is the default example configuration of user_clusters provided by PostgreSQL. This config file was generated by PostgreSQL running on Debian 9.
It is located under: /etc/postgresql-common/user_clusters
# This file maps users against the database clusters to which they # will connect by default. Any user may create ~/.postgresqlrc which # will supersede the defaults stored here. If a database is # specified, that will be the one connected to by client tools if none # is specified on the command line. If the database specified here is # "*", this is interpreted as the database whose name is the same as # the user's login. (Setting the database to "*" will provide the # current default upstream behaviour for command line tools.) # # When pg_wrapper scans this file, the first matching line is used. # It is a good idea to provide a default explicitly, with a final line # where both user and group are set to "*". If there is no default, # the implicit default is to connect to the cluster listening on # port 5432 and to the database matching the user's login name. # # In the context of this file, user and group refer to the Unix login # or group, not to PostgreSQL users and groups. # # Please see user_clusters(5) and postgresqlrc(5) for more information. # # USER GROUP VERSION CLUSTER DATABASE
Download the raw file with wget or curl
wget -O user_clusters.example http://exampleconfig.com/static/raw/postgresql/debian9/etc/postgresql-common/user_clusters
curl http://exampleconfig.com/static/raw/postgresql/debian9/etc/postgresql-common/user_clusters > user_clusters.example
Other config files you might find useful