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I have the following issue on Ubuntu 12.04 LTS on a 64-bit machine: Whenever I try to update the aptitude repos, the update will strangely fail with a i386-related error. I assume that this shouldn't be happening on a 64-bit system.

root@liv-HP-Compaq-dc7900:/home/liv# apt-get update
Ign file: apt-build Release.gpg
Get:1 file: apt-build Release [107 B]                                          
Ign file: apt-build/main TranslationIndex                                      
Err file: apt-build/main i386 Packages                                         
  File not found
[..]
W: Failed to fetch file:/var/cache/apt-build/repository/dists/apt-build/main/binary-i386/Packages  File not found

E: Some index files failed to download. They have been ignored, or old ones used instead.

I tried to restore status-old with no luck:

sudo cp /var/lib/dpkg/status-old /var/lib/dpkg/status

I also tried:

root@liv-HP-Compaq-dc7900:/home/liv# apt-get -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 90 not upgraded.

But it doesn't seem to do or report anything useful. Each subsequent apt-get update ends up in an error.

For the record, my /etc/apt/sources.list file looks like this:

# deb cdrom:[Xubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/main/binary-i386/

# deb cdrom:[Xubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/multiverse/binary-i386/
# deb cdrom:[Xubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/restricted/binary-i386/
# deb cdrom:[Xubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/universe/binary-i386/
# deb cdrom:[Xubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ precise main multiverse restricted universe

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://nl.archive.ubuntu.com/ubuntu/ precise main restricted
deb-src http://nl.archive.ubuntu.com/ubuntu/ precise main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://nl.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb-src http://nl.archive.ubuntu.com/ubuntu/ precise-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://nl.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://nl.archive.ubuntu.com/ubuntu/ precise universe
deb http://nl.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://nl.archive.ubuntu.com/ubuntu/ precise-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://nl.archive.ubuntu.com/ubuntu/ precise multiverse
deb-src http://nl.archive.ubuntu.com/ubuntu/ precise multiverse
deb http://nl.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://nl.archive.ubuntu.com/ubuntu/ precise-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://nl.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://nl.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu precise-security main restricted
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
deb http://security.ubuntu.com/ubuntu precise-security universe
deb-src http://security.ubuntu.com/ubuntu precise-security universe
deb http://security.ubuntu.com/ubuntu precise-security multiverse
deb-src http://security.ubuntu.com/ubuntu precise-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu precise partner
# deb-src http://archive.canonical.com/ubuntu precise partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu precise main
deb-src http://extras.ubuntu.com/ubuntu precise main
deb http://cran.at.r-project.org/bin/linux/ubuntu precise/
# deb-src http://cran.at.r-project.org/bin/linux/ubuntu precise/
# deb http://archive.canonical.com/ precise partner
# deb-src http://archive.canonical.com/ precise partner

And the kernel in use is:

liv@liv-HP-Compaq-dc7900:~$ uname -a
Linux liv-HP-Compaq-dc7900 3.2.0-57-generic #87-Ubuntu SMP Tue Nov 12 21:35:10 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

What is wrong and how can I fix it?

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3 Answers 3

up vote 10 down vote accepted

I had the same issue using my own apt-mirror server to update the git-core package.

In my case, I resolved the issue by adding [arch=amd64] in the original entry in the /etc/apt/sources.list.

Example:
Original: deb http://192.168.111.222/mirror/git-core precise main
Solution: deb [arch=amd64] http://192.168.111.222/mirror/git-core precise main

The details can be found at: https://wiki.ubuntu.com/MultiarchSpec#apt_sources

In your case, you need to edit /etc/apt/sources.list.d/apt-build.list.

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It worked now. I only had to use the [arch=amd64] trick on /etc/apt/sources.list.d/apt-build.list. –  landroni Mar 20 at 16:40

You don't appear to have any real repositories enabled. The only one there is a local output of apt-build. I'm not sure how this has happened but you need to add the standard repos back to /etc/apt/sources.list. See:

When you've done that, sudo apt-get update and then you should be able to install again.

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I'm not sure that this is the issue. It seems to me that several repos are enabled (see edit in description). And maybe I didn't mention it in the description, but I can install software and Synaptic seems functional as far as I can see (other repos get updated and software updates install). But for this nagging error message on each update.. –  landroni Dec 23 '13 at 16:44

As suggested by the accepted answer, I had to edit the contents of:

/etc/apt/sources.list.d/apt-build.list

From:

deb file:/var/cache/apt-build/repository apt-build main

to:

deb [arch=amd64] file:/var/cache/apt-build/repository apt-build main

Note that the error came solely from apt-build.list. No changes to /etc/apt/sources.list were needed to fix the problem.

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