Starting apache fails (could not bind to address 0.0.0.0:80)

Question

Update: Already fixed, it seems that one of VirtualHosts configurations files was wrong in sites-enabled.

I have Ubuntu 11.10

When I run the command to start

Answer 1

I had the same error, and just want to confirm that running

    sudo netstat -ltnp | grep ':80'

helped me indicate that Hiawatha webserver was in the way of Apache2.

Removing Hiawatha fixed the issue (sudo dpkg --purge hiawatha). Ubuntu 12.04.2 server.