Completely reset an Apache instance in Ubuntu

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

Amarok won't play audio files on Ubuntu 10.04

sudo apt-get install libxine1-ffmpeg

after install this package restart Amarok