Changing the location of the default data directory on PG 9.6.6 (CentOS 7)?

[Robert Gordon <rgordon@xxxxxxxxxxxxxxxxx>]

I’m trying to identify which postgresql.conf file I should be editing, in order to change the default database files location for Postgres 9.6.6, when installed on CentOS 7.x/

 

Is the bet method for changing the default data directory at the time of database init, to include the $PGDATA variable at initialization, such as:

su - postgres -c '/usr/pgsql-9.6/bin/initdb --pgdata=$PGDATA', where $PGDATA is the directory path that I want the psql database files to reside?