This question already has an answer here:
I'm trying to update my system with the habitual sequence of codes:
$ sudo apt-get update $ sudo apt-get upgrade
But when the first code finishes, it appears the follow message:
W: Fail to search http://ppa.launchpad.net/fossfreedom/packagefixes/ubuntu/dists/vivid/main/binary-amd64/Packages 404 Not Found W: Fail to search http://ppa.launchpad.net/fossfreedom/packagefixes/ubuntu/dists/vivid/main/binary-i386/Packages 404 Not Found
And appears some other messages too, but the site don't allow me to post more than 2 links with my reputation points.
I use the Ubuntu 15.04 vivid, Kernel Linux 3.19.0-15-generic, MATE 1.8.2.
I tried a sort of things, like update the
/etc/apt//sources.list, and use the banish 404, but none of them was in success. If someone could help me, it would be great. Thank you very much.