Setup Apache2's mod_wsgi on Ubuntu

If you get this when restarting Apache2 on Ubuntu

Invalid command 'WSGIDaemonProcess', perhaps misspelled or defined by a module not included in the server configuration
Action 'configtest' failed.

it means you don't have mod_wsgi module installed.

These commands install and enable it.

sudo apt-get install libapache2-mod-wsgi
sudo a2enmod mod-wsgi
sudo /etc/init.d/apache2 restart