createdb confusion - Mailing list pgsql-general

man creatdb says -D supposed to be specify the
alternative location

I try (as postgres user)

$ createdb -D /bla bla

and it says

    absolute path are not allowed.

Then I read man initlocation.  The example
I see is

$ initlocation /opt/postgres/data
$ createdb -D /opt/postgres/data/testdb testdb

so I do the same and it fails with the same reason

Does anyone have any idea?

thanks