Step 1. Connect to the server as root or execute commands as sudo

#sudo su

Step 2. remove all log files

rm -rf /var/log/apache2/*

rm -rf /var/log/virtualmin/*

....

Step 1. Install Xdebug

If not already ainstalled, Install Xdebug (I'ts already on the package WAML, LAMP, MAMP)

In Linux Debian/Ubuntu/Mint

# sudo apt-get install php5-xdebug

Site Name:    

$site_name = \Drupal::config('system.site')->get('name');

 

Site Address (Host)

$site_addr = "http://" . \Drupal::request()->getHost();

In drupal 8 block is part of the plugin system.

Step 1. Create a simple module like this.

Step 1.

Check apache error log (use tail to show in real time)

# tail -f /var/log/apache2/error.log

Step 2 : 

Check MySQL database connection using mysql -uusername -ppassword