Re: problem startting postgresql

> but i have small doubt what is the difference between
>
> $ adduser postgres
>     and
> $ su - -c "useradd postgres"

The first ought to fail because a non-superuser should not have the
ability to add new users to the system. (The $ prompt indicates that you
are not a superuser.)  If it worked, your system would be completely
insecure.

The second becomes superuser before trying to add the new user.

Perhaps you need to do a basic Unix course...

--
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight, UK                             http://www.lfix.co.uk/oliver
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     "Behold, happy is the man whom God correcteth.
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      Almighty."         Job 5:17