Hello I am using Ubuntu 11.04 as my OS.The available versions of Apache2 for Ubuntu are listed below apache2-mpm-prefork - Apache HTTP Server - traditional non-threaded model apache2-mpm-worker - Apache HTTP Server - high speed threaded model 1 Can you please explain to me the difference between the two types 2 What version shall I use for learning PHP --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx