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postgres@db-web-dev:/etc/ssl$ /usr/lib/postgresql/8.1/bin/pg_ctl -D /var/lib/postgresql/8.1/main/ start
pg_ctl: another postmaster may be running; trying to start postmaster anyway
postmaster cannot access the server configuration file "/var/lib/postgresql/8.1/main/postgresql.conf": No such file or directory
pg_ctl: could not start postmaster
Examine the log output.