yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm

yum search postgresql13-server  --showduplicates

yum search postgresql13-server  --showduplicates

yum install -y postgresql13-server-13.6-1PGDG.rhel7.x86_64

/usr/pgsql-13/bin/postgresql-13-setup initdb
systemctl enable postgresql-13
systemctl start postgresql-13

createdb db001

#创建超级用户user001
createuser -s -P user001

listen_addresses = '*'          # what IP address(es) to listen on;
                                        # comma-separated list of addresses;
                                        # defaults to 'localhost'; use '*' for all
                                        # (change requires restart)

psql -U user001-h localhost db001

host    all     all             10.6.8.0/24                 trust