Скачать или смотреть How to Upgrade PostgreSQL from 9.x to 10 on Debian?

This video will show how to upgrade PostgreSQL Database Server
from PostgreSQL 9.6 to PostgreSQL 10 on Debian.

Here is the commands:

$ su -

dpkg-query -l postgresql*

// Run pg_lsclusters, your 9.6 and 10 main clusters should
// be "online".
pg_lsclusters

// Stop the 10 cluster and drop it.
pg_dropcluster 10 main --stop

// Upgrade the 9.6 cluster to the latest version.
pg_upgradecluster 9.6 main

// Your 9.6 cluster should now be "down".
pg_lsclusters

// Check that the upgraded cluster works,
// then remove the 9.6 cluster.
psql -U postgres

pg_dropcluster 9.6 main

// After all you may totally remove version 9.6 from the server
apt --purge remove postgresql-client-9.6 postgresql-9.6

dpkg-query -l postgresql*