Comment 28 for bug 565810

@Linuxexperte: modifying your hosts file doesn't mean the site is up again. You've just made that url on your system to point to another server (not the faulty one).

Another command to modify your hosts file is (preferred, IMHO):

echo 88.191.101.8 packages.medibuntu.org | sudo tee -a /etc/hosts > /dev/null

To undo the modification:

grep -v packages.medibuntu.org /etc/hosts | sudo tee /etc/hosts > /dev/null