I consistently (several weeks already) get the error:

Unable to connect to mozart.ee.ic.ac.uk:http:
Failed to fetch [package name] 

I am Using Linux Mint 19.3

Every time I do a apt-install (anything) or apt update (with and without sudo) it starts running, downloading several items until it gets to the mozart site, where it hangs for a while and then gives up.

Is there a solution to this?

2 Answers 2


The mirror seems to be buggy, open your sources.list then replace the first repository url with a working one e,g:

sudo nano /etc/apt/sources.list.d/official-package-repositories.list

then replace the url http://mozart.ee.ic.ac.uk with http://mirror.pit.teraswitch.com/linuxmint/ like this:

deb http://mirror.pit.teraswitch.com/linuxmint/ tessa main upstream import backport

The list of available mirrors (at the bottom of the page: Repository mirrors ).

  • 1
    Thanks for that. The suggested urls did not actually work, got lots of errors on it, but I was not aware of this repositries list. Now when I did a google search on it, I found a working list, copied/pasted and voila, all good! The page that helped is: easylinuxtipsproject.blogspot.com/p/sources.html Jan 13, 2021 at 17:41

I replaced the entire contents with this, and it works great:

deb http://packages.linuxmint.com ulyssa main upstream import backport
deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
deb http://archive.canonical.com/ubuntu/ focal partner

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