If you get this error when restarting httpd on plesk linux servers:

"Address already in use: make sock: could not bind to address no listening sockets available."

Actually the error says it all.

First, try to look for the processes that is listening to port 80 or 443. You can do this:

1. netstat -lnp grep ''
2. lsof grep *:www
3. lsof -i:443
4. fuser -v 443/tcp
5. netstat -tulpen grep :443

After pointing out which uses the port, send a kill signal:

#kill -9 PID

Replace "PID" with the actual PID.

Hope that helps.

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