Mostrar errores de php en ubuntu

~>$sudo gedit /etc/php5/apache2/php.ini

(poner la variable Display_Errors en On)

 * Restarting web server apache2
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName
... waiting apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName
[ OK ]

~>$sudo /etc/init.d/apache2 restart