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Upgrading Postgres 8.4 to 9.0 - Ubuntu / GNU Debian step by step If your safe-upgrade just upgraded your postgresql to 9.0, your databases probably does not work and there is no postgresql-8.4 in your system. It is an unfortunate behavior, but we can simply migrate our data to new Postgres, here is how:
First, install your old postgres 8.4:
sudo -i
aptitude install postgresql-8.4
Stop all services using postgres databases and make backup of all databases and roles:
su - postgres
pg_dumpal... Zobacz wpis
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