sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
curl -fsSL https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/postgresql.gpg
apt update
apt install postgresql-16
pg_dropcluster --stop 16 main
pg_upgradecluster --method=upgrade --link 15 main
pg_lsclusters
15 main 5433 down postgres /var/lib/postgresql/15/main /var/log/postgresql/postgresql-15-main.log
16 main 5432 online postgres /var/lib/postgresql/16/main /var/log/postgresql/postgresql-16-main.log