PostgreSQL: Instalando no CentOS 8

#1 Instale o repositório RPM:

sudo dnf install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-8-x86_64/pgdg-redhat-repo-latest.noarch.rpm

#2 Desative o módulo PostgreSQL integrado:

sudo dnf -qy module disable postgresql

#3 Instale o PostgreSQL:

sudo dnf install -y postgresql12-server

#4 inicialize o banco de dados e habilite o início automático:

sudo /usr/pgsql-12/bin/postgresql-12-setup initdb

sudo systemctl start postgresql-12

systemctl start postgresql.service