This is the default example configuration of createcluster.conf provided by PostgreSQL. This config file was generated by PostgreSQL running on Ubuntu 14.04.
It is located under: /etc/postgresql-common/createcluster.conf
# Default values for pg_createcluster(8)
# Create a "main" cluster when a new postgresql-x.y server package is installed
#create_main_cluster = true
# Default start.conf value, must be one of "auto", "manual", and "disabled".
# See pg_createcluster(8) for more documentation.
#start_conf = 'auto'
# In the following options, occurrences of '%v' are replaced by the major
# version number, and '%c' by the cluster name. Use '%%' for a literal '%'.
# Default data directory.
#data_directory = '/var/lib/postgresql/%v/%c'
# Default directory for transaction logs
# Unset by default, i.e. pg_xlog remains in the data directory.
#xlogdir = '/var/lib/postgresql/xlog/%v/%c/pg_xlog'
# Options to pass to initdb.
#initdb_options = ''
# All other options are copied into the new cluster's postgresql.conf
log_line_prefix = '%%t '
Download the raw file with wget or curl
wget -O createcluster.conf.example http://exampleconfig.com/static/raw/postgresql/ubuntu14.04/etc/postgresql-common/createcluster.conf
curl http://exampleconfig.com/static/raw/postgresql/ubuntu14.04/etc/postgresql-common/createcluster.conf > createcluster.conf.example
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