Ubuntu apt-get unable to fetch packages

Just installed Ubuntu 13.10 (Saucy) and anything I try to install via `sudo apt-get install` is failing and throwing a series of `404` erros. Example - installing `tmux` [jeeves@HAL] hadoop > sudo apt-get install tmux [sudo] password for jeeves: Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: tmux 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 247 kB of archives. After this operation, 577 kB of additional disk space will be used. WARNING: The following packages cannot be authenticated! tmux Install these packages without verification [y/N]? Y Err http://us.archive.ubuntu.com/ubuntu/ saucy/main tmux amd64 1.8-4 404 Not Found [IP: 91.189.91.23 80] Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/t/tmux/tmux_1.8-4_amd64.deb 404 Not Found [IP: 91.189.91.23 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? In this case it can't fetch an archive URL. I get something similar when installing `mysql-server` .... Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/m/mysql-5.5/mysql-common_5.5.37-0ubuntu0.13.10.1_all.deb 404 Not Found [IP: 91.189.91.23 80] Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/m/mysql-5.5/libmysqlclient18_5.5.37-0ubuntu0.13.10.1_amd64.deb 404 Not Found [IP: 91.189.91.23 80] Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/libd/libdbi-perl/libdbi-perl_1.627-1_amd64.deb 404 Not Found [IP: 91.189.91.15 80] .... ... and numerous other packages. I even tried `sudo apt-get update` and running with `--fix-missing?` Is the Ubuntu repository just down (which seems odd given how many people rely on it) or did I miss something? **EDIT:** Here's what happens when I try `sudo apt-get update`. The update itself doesn't work because of resources that can't be found > sudo apt-get update Hit http://download.virtualbox.org maverick InRelease Ign http://us.archive.ubuntu.com saucy InRelease Ign http://us.archive.ubuntu.com saucy-updates InRelease Ign http://extras.ubuntu.com saucy InRelease Ign http://us.archive.ubuntu.com saucy-backports InRelease Hit http://download.virtualbox.org maverick/contrib amd64 Packages Hit http://download.virtualbox.org maverick/non-free amd64 Packages Ign http://us.archive.ubuntu.com saucy Release.gpg Hit http://extras.ubuntu.com saucy Release.gpg Hit http://download.virtualbox.org maverick/contrib i386 Packages Ign http://us.archive.ubuntu.com saucy-updates Release.gpg...