After start and stop apache:
.: 44: Can't open /etc/apache2/envvars
Find and drop all Apache packages:
sudo dpkg --get-selections | grep apache
sudo apt-get remove --purge apache2 apache2-mpm-worker apache2-threaded-dev apache2-utils apache2.2-common libapache2-mod-python libapache2-mod-python-doc libapache2-mod-wsgi
reinstall apache:
sudo apt-get install apache2 libapache2-mod-python libapache2-mod-wsgi libapache2-mod-python-doc
