Hi

Thanks for the tutorial - very helpful.

 I found that when it came to the point to:

    "Open a PostgreSQL shell."

    psql -U postgres

 it was helpful to change to postgres first.

e.g. su -m postgres

then:
    pgsl -U postgres
    alter ....
    \q

and then back with:

    su -

Just a thought anyway.

Best regards, Ian