Binary package hint: apt
My maverick dist-upgrade attempt failed with:
Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/pool/universe/l/lilypond/lilypond-data_2.12.3-6_all.deb 404 Not Found
Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/pool/universe/q/qemu-kvm/qemu-kvm-extras_0.12.4+noroms-0ubuntu4_i386.deb 404 Not Found
Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/pool/universe/t/ttf-baekmuk/ttf-baekmuk_2.2-3_all.deb 404 Not Found
Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/pool/universe/t/ttf-kochi/ttf-kochi-mincho_20030809-9_all.deb 404 Not Found
Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/pool/universe/w/wireshark/wireshark-common_1.2.9-1_i386.deb 404 Not Found
Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/pool/universe/g/gcc-mingw32/gcc-mingw32_4.4.4-0.1_i386.deb 404 Not Found
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
I'm pretty certain that at least some of those files were available on at least one mirror; if nothing else, http://mirrors.ubuntu.com/mirrors.txt shows http://archive.ubuntu.com/ubuntu/ as its first entry, and that definitely has that version of lilypond-data. Shouldn't mirror: try other mirrors if one of them 404s? Otherwise it seems that it is likely to fail if any of the mirrors is unreliable, rather than giving me increased reliability which I think should be achievable.
Here's what http://mirrors.ubuntu.com/mirrors.txt looks like from here:
http://archive.ubuntu.com/ubuntu/
http://mirror.ox.ac.uk/sites/archive.ubuntu.com/ubuntu/
http://www.mirrorservice.org/sites/archive.ubuntu.com/ubuntu/
http://ubuntu.retrosnub.co.uk/ubuntu/
http://mirrors.melbourne.co.uk/ubuntu/
http://ubuntu.datahop.net/ubuntu/
http://mirror01.th.ifl.net/ubuntu/
http://mirror.as29550.net/archive.ubuntu.com/
http://mirror.sov.uk.goscomb.net/ubuntu/
http://ubuntu.positive-internet.com/ubuntu/
http://ubuntu.virginmedia.com/archive/
http://mirror.bytemark.co.uk/ubuntu/
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: apt 0.7.25.3ubuntu9
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
Architecture: i386
Date: Mon Jul 5 15:15:04 2010
EcryptfsInUse: Yes
ProcEnviron:
LANGUAGE=en_GB:en
LC_COLLATE=C
PATH=(custom, user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: apt
Status changed to 'Confirmed' because the bug affects multiple users.