Forum OpenACS Q&A: Re: (Error: can't read "address": no such variable) after Install OpenACS with NaviServer from Scratch

Looks like an nsd or other service is already using the port:

"Error: nssock_v4: failed to listen on []:8000: Address already in use"

The script sets up an autostart. You can check and control by issuing one of these from root (or sudo):

oacs-5-9 status
oacs-5-9 stop
oacs-5-9 start