I'm running Linux Mint 16 (Petra). I was able to install packages normally until, at least, april 18th (two weeks ago). Since yesterday I cannot install packages anymore. For example, if I try to install
sudo apt-get install screen
I get the following warning:
WARNING: The following packages cannot be authenticated! screen Install these packages without verification [y/N]?
If I ignore the warning, I get
Err http://archive.ubuntu.com/ubuntu/ saucy/main screen amd64 4.0.3-14ubuntu10 404 Not Found [IP: 220.127.116.11 80] Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/s/screen/screen_4.0.3-14ubuntu10_amd64.deb 404 Not Found [IP: 18.104.22.168 80] W: Duplicate sources.list entry http://archive.getdeb.net/ubuntu/ trusty-getdeb/apps amd64 Packages (/var/lib/apt/lists/archive.getdeb.net_ubuntu_dists_trusty-getdeb_apps_binary-amd64_Packages) W: Duplicate sources.list entry http://archive.getdeb.net/ubuntu/ trusty-getdeb/apps i386 Packages (/var/lib/apt/lists/archive.getdeb.net_ubuntu_dists_trusty-getdeb_apps_binary-i386_Packages) W: You may want to run apt-get update to correct these problems E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
With other packages it's the same. First the warning, then some 404s, then the "unable to fetch some archives" error.
I've tried running
apt-get update (which also throws lots of 404s), checked that I'm not behind a proxy, nothing worked.
From what I've read I guess it may have something to do with my distro being unsupported. But Petra when obsolete in July 2014 and I've had this problem since only a few days ago. If that's the problem, do I need to upgrade or is there another solution?