> i have restore my old data folder in pgsql
> but still there is a permission problem
Can you give us any more info? Specific error messages?
In general, permissions should be (I think):
chown -R postgres:postgres /path/to/data
find /path/to/data -type -d -print | xargs chmod 700
find /path/to/data -type -f -print | xargs chmod 600
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