service apache2 restart
returns:
AH00557: apache2: apr_sockaddr_info_get() failed for blogs AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1. Set the 'ServerName' directive globally to suppress this message
This error is usually harmless.
A quick solution to this problem:
sudo vi /etc/apache2/apache2.conf
# Insert at the end of the file
ServerName localhost
NOTE: Sometimes a complex /etc/hosts file is required that includes all your virtual hosts.
172.0.0.1 localhost.localdomain localhost 127.0.1.1 blogs
service apache2 restart * Restarting web server apache2 [ OK ]