Installing PostgresSQL

Document Address
https://wiki.ubuntu.org.cn/PostgreSQL

Linux Installation of PostgreSQL
https://www.postgresql.org/download/

The configuration files for the PostgreSQL database are located in

/var/lib/pgsql/{version_number}/data

For example, /var/lib/pgsql/11/data

　　pg_hba.conf: Configures access permissions to the database,
　　postgresql.conf: Configures the corresponding parameters for the PostgreSQL database server.