...

pl.: /var/lib/pgsql84/bin/psql -U postgres84 template1 -f dblink.sql

Adatbázis upgrade verziók között

sudo pg_dropcluster 9.6 main --stop (alapértelmezetten telepített friss verzió adatbázisának eldobása)

sudo pg_upgradecluster 9.4 main (Frissítés)

PostgreSQL upgrade

forrás

Stop the 9.6 cluster and drop it.

sudo pg_dropcluster 9.6 main --stop

Upgrade the 9.4 cluster to the latest version.

sudo pg_upgradecluster 9.4 main

Your 9.4 cluster should now be "down".

pg_lsclusters 
Ver Cluster Port Status Owner    Data directory               Log file
9.4 main    5433 down   postgres /var/lib/postgresql/9.4/main /var/log/postgresql/postgresql-9.4-main.log
9.6 main    5432 online postgres /var/lib/postgresql/9.6/main /var/log/postgresql/postgresql-9.6-main.log

Check that the upgraded cluster works, then remove the 9.4 cluster.

sudo pg_dropcluster 9.4 main

After all you may totally remove version 9.4 from the server:

sudo apt-get --purge remove postgresql-client-9.4 postgresql-9.4

SUPERUSER privilégiumok megadása

ALTER USER

...

myuser

...

WITH

...

SUPERUSER;