404 not found error

After copying drupal content to the httpdocs  the site was behaving not as needed so got rid of the drupal content and with the initial set of file was getting "404 not found error"
The requested URL / was not found on this server.

referring the /var/log/apache2/error.log showed
[mon Mar 01...][error][client 192.168.1.2] file does not exist: /var/www/gnumen.net

after having a look in /etc/apache2/site-available
I found that some days back created a gnumen.net file with DocumentRoot as /var/www/gnumen.net, after renaming it the error was done with.

Bind9 failed to start at the startup

bind failed to start at the startup and again when manually starting the service
sudo /etc/init.d/bind9 start
it showed failed
after going thru the tail -20 /var/log/syslog
found the following error
ubuntuserver named[5045]: starting BIND 9.4.2-p2.1 -u bind
ubuntuserver named[5045]: found 1 cpu, using 1 worker thread
ubuntuserver named[5045]: loading configuration from /etc/bind/named.conf
ubuntuserver named[5045]: /etc/bind/named_ehcp.conf: zone 'gnujit.net': already exists previous definition: /etc/bind/named_ehcp.conf: 56
ubuntuserver named[5045]: /etc/bind/named_ehcp.conf: zone 'gnumen.net': already exists previous definition: /etc/bind/named_ehcp.conf: 20
ubuntuserver named[5045]: loading configuration: failure
ubuntuserver named[5045]: exiting (due to fatal error)

solution:- comment the following previous definition in the /etc/bind/named_ehcp.conf