Start a shell as the `_postgresql` user (as root run `su _postgresql -` then run the `initdb` command to initialize postgresql.
You will need to specify pgdata directory to the default (`/var/postgresql/data`) with the `-D <path>` and set the user to postgres with the `-U <username>` flag. This can be done as follows:
Start a shell as the `_postgresql` user (as root run `su _postgresql -` then run the `initdb` command to initialize postgresql.
You will need to specify pgdata directory to the default (`/var/postgresql/data`) with the `-D <path>` and set the user to postgres with the `-U <username>` flag. This can be done as follows: