Hi,
> /var/run/ might be on a temporary file system. So you need to adjust
> your init script to create that directory if it doesn't exist.
That is what I tried now and it works for now.
I never had installed the Debian's PostgreSQL packages and I once
manually installed those init.d-script. Assigning that to the
different runlevels is possible by manually add those symbolic links
or by using a runlevel editor GUI in Ubuntu.
Thanks very much for all your responses!
Sebastian