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 screen:

sudo apt-get install screen

I get the following warning:

WARNING: The following packages cannot be authenticated!
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: 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/s/screen/screen_4.0.3-14ubuntu10_amd64.deb  404  Not Found [IP: 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?


1 Answer 1


Petra is based on Ubuntu 13.10, Saucy Salamander. The Saucy files were kept around on http://archive.ubuntu.com until a few days ago; they are now available on http://old-releases.ubuntu.com. If you really want to continue using Petra, you should replace "archive" with "old-releases" in your /etc/apt/sources.list configuration file.

There hasn't been any security support for this release for quite a while, so you should really upgrade to a newer version of Mint...

  • Fine. But my sources.list file says http://us.archive.ubuntu.com/ubuntu lucid main universe (note lucid, not saucy). Is that normal?
    – abl
    Commented May 3, 2015 at 9:41
  • There's presumably another file somewhere in /etc/apt/sources.list.d with the saucy lines... Commented May 3, 2015 at 15:15

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