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

This will happen because of repeated installation of apache or port is using by another service

sudo lsof -i | grep "httpd"

You will find process id and listening port of service. Then check

cd /proc/(process id of http)

Then kill that process using command

kill -9 pid

now

sudo netstat -nltp

again kill the process

syntax:-

kill -9 pid

and now start apache

sudo ./apachectl start