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I had a Ubuntu 20.04 LTS system with a postgresql version 10
database, and the system became unbootable. The database was stored
in /var/lib/postgresql/10/main and I was able to recover the entire
contents of the data in that directory and below. I now have a
system running ubuntu 24.04 LTS with postgresql version 16.<br>
<br>
I obviously no longer have a running version 10 server, so I cannot
use pg_dump to retrieve the data. I have placed the recovered
version files in /var/lib/postgresql/10/main on my new system,
alongside the /var/lib/postgresql/16/main that was created when I
installed postgresql. I have tried several iterations of the
pg_upgradecluster command, a Python script provided by Ubuntu, but
it says it cannot find the database files.<br>
<br>
I also see from the postgresql wiki pages that there is a pg_upgrade
utility program, but cannot find in any of the Ubuntu-provided
installation files. Can anyone provide some guidance on how I might
proceed?<br>
<br>
Thanks in advance.<br>
<br>
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