vim /lib/systemd/system/pocketbase.service
systemctl enable pocketbase
systemctl start pocketbase
systemctl status pocketbase
systemctl stop pocketbase
systemctl restart pocketbase
vim /lib/systemd/system/pocketbase.service
systemctl enable pocketbase
systemctl start pocketbase
systemctl status pocketbase
systemctl stop pocketbase
systemctl restart pocketbase
TL;DR
Install Postgres 9.6, and then:
sudo pg_dropcluster 9.6 main --stop
sudo pg_upgradecluster 9.5 main
sudo pg_dropcluster 9.5 main