Install Roundcube

You'll need apache, and mysql installed. If they are not already installed the following command will install them.

$ sudo aptitude install apache2

Run the following command to install roundcube

$ sudo aptitude install roundcube roundcube-mysql

Configure roundcube

$ dpkg-reconfigure roundcube-core

Next create a symbolic link to apache's document root, in this case /var/www

$ sudo ln -s /usr/share/roundcube /var/www/roundcube

Restart Apache

$ sudo service apache2 restart