Apache2 is an opensource web server that will run on many operating systems. Linux is probably the most common platform for running Apache2.

Useful code

for setting up a virtual host that will handle a primary domain as well as an alias

To use Apache to password protect a site you can set the following lines in the .htaccess file for the site

AuthUserFile /home/user/.htpasswd
AuthType Basic
AuthName “Guest”
Require valid-user

The following command will generate a .htpasswd file and request the password that will be set

htpasswd -c /home/user/.htpasswd