Your Error may be the following,
Restarting web server: apache2apache2: apr_sockaddr_info_get() failed for luza.blz.in 127.0.0.1 luza
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
... waiting apache2: apr_sockaddr_info_get() failed for luza.blz.in 127.0.0.1 luza
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
It means, Your server name is not associated/linked with the "localhost"
Step 1: Find the apache2.conf file. It may be available at /etc/apache2/apache2.conf
Step 2: Just add the following line in apache2.conf
ServerName 127.0.0.1
Step 3: Save file & Restart apache webserver.