Single combine log, is possible?

[romeo]

Hi all,
I wuold like to know if there is a way to have a single combine log for all the virtual host in a server.
I have tried to edit the apache2.conf and adding Cusomlog directive, but i suppose this is not the right way.

My idea is to use the tail -f command to see al the web server traffic in real time, i don't really need a single log file, maybe there is a unix turnaround i don't know.

Thanks in advance

Romeo