4.2. Installing PostgreSQL

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RHEL 9 provides PostgreSQL 13 as the initial version of this Application Stream, which you can install easily as an RPM package.

Additional PostgreSQL versions are provided as modules with a shorter life cycle in minor releases of RHEL 9. RHEL 9.2 introduced PostgreSQL 15 as the postgresql:15 module stream.

To install PostgreSQL, use the following procedure.

Procédure

Install the PostgreSQL server packages:
- For PostgreSQL 13 from the RPM package:
```
# dnf install postgresql-server
```
- For PostgreSQL 15 by selecting stream (version) 15 from the postgresql module and specifying the server profile:
```
# dnf module install postgresql:15/server
```
  The postgres superuser is created automatically.
Initialize the database cluster:
```
# postgresql-setup --initdb
```
Red Hat recommends storing the data in the default /var/lib/pgsql/data directory.
Start the postgresql service:
```
# systemctl start postgresql.service
```
Enable the postgresql service to start at boot:
```
# systemctl enable postgresql.service
```

4.2. Installing PostgreSQL

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