I have been having a problem for a few day.
I can't upgrade linux (16.04LTS) anymore and I can't install packages. Here's what I get :
sudo apt-get update
I don't put everything because I am not allowed to post many links
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/dists/xenial/main/dep11/icons-64x64.tar 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.
sudo apt-get upgrade
Reading package lists... Done Building dependency tree
Reading state information... Done Calculating upgrade... Done The following packages have been kept back: debhelper 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
sudo apt-get install x11vnc
Reading package lists... Done Building dependency tree
Reading state information... Done E: Unable to locate package x11vnc remi@remi-Lenovo-G70-80:~$
Does anybody know what the problem is ?