无法下载存储库信息（错误的sources.list条目或格式错误的文件）

Question

我在尝试更新软件包列表时收到以下错误日志：

Failed to download repository information
Check your Internet connection.
W:Failed to fetch http://ftp.wcss.pl/ubuntu/dists/trusty-updates/InRelease  Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
W:Failed to fetch http://ftp.wcss.pl/ubuntu/dists/trusty-backports/InRelease  Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
W:Failed to fetch http://ftp.wcss.pl/ubuntu/dists/trusty-security/InRelease  Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
W:Failed to fetch http://ftp.wcss.pl/ubuntu/dists/trusty/Release  Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
W:Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/raring/Release  Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
E:Some index files failed to download. They have been ignored, or old ones used instead.

尝试过apt-get clean，autoclean更改服务器，甚至删除架构（但 dpkg 说我不能，因为它正在被数据库使用）。还尝试删除包含有问题的条目的行，但我的sources.list不包含它们。当我cat /etc/apt/sources.list /etc/apt/sources.list.d/*这样做时，我得到的是：

# deb cdrom:[Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release amd64 (20140722.2)]/ trusty main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ftp.wcss.pl/ubuntu/ trusty main restricted
deb-src http://ftp.wcss.pl/ubuntu/ trusty main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://ftp.wcss.pl/ubuntu/ trusty-updates main restricted
deb-src http://ftp.wcss.pl/ubuntu/ trusty-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://ftp.wcss.pl/ubuntu/ trusty universe
deb-src http://ftp.wcss.pl/ubuntu/ trusty universe
deb http://ftp.wcss.pl/ubuntu/ trusty-updates universe
deb-src http://ftp.wcss.pl/ubuntu/ trusty-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://ftp.wcss.pl/ubuntu/ trusty multiverse
deb-src http://ftp.wcss.pl/ubuntu/ trusty multiverse
deb http://ftp.wcss.pl/ubuntu/ trusty-updates multiverse
deb-src http://ftp.wcss.pl/ubuntu/ trusty-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://ftp.wcss.pl/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://ftp.wcss.pl/ubuntu/ trusty-backports main restricted universe multiverse

deb http://ftp.wcss.pl/ubuntu/ trusty-security main restricted
deb-src http://ftp.wcss.pl/ubuntu/ trusty-security main restricted
deb http://ftp.wcss.pl/ubuntu/ trusty-security universe
deb-src http://ftp.wcss.pl/ubuntu/ trusty-security universe
deb http://ftp.wcss.pl/ubuntu/ trusty-security multiverse
deb-src http://ftp.wcss.pl/ubuntu/ trusty-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 trusty partner
# deb-src http://archive.canonical.com/ubuntu trusty partner

## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## 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 trusty main
# deb-src http://extras.ubuntu.com/ubuntu trusty main
deb file:///var/cuda-repo-7-0-local /
deb file:///var/cuda-repo-7-0-local /
deb http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1404/x86_64 /
deb http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1404/x86_64 /
deb [arch=i386,amd64] http://linux.dropbox.com/ubuntu trusty main
deb [arch=i386,amd64] http://linux.dropbox.com/ubuntu trusty main
deb http://old-releases.ubuntu.com/ubuntu/ raring main restricted universe multiverse
# deb http://old-releases.ubuntu.com/ubuntu/ raring main restricted universe multiverse
deb http://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1404/x86_64 /
deb http://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1404/x86_64 /

这也不同于建议的重复- 我的错误日志不包含损坏行的索引。实际上，我的sources.list甚至不包含与消息中提到的类似的条目。

我能用它做什么？

Answer 1

根据这个错误：

 Unable to find expected entry 'main/binary-aarch64/Packages'

您已添加aarch64架构，但存储库没有适用于该架构的包。

查看：

dpkg --print-architecture

和

dpkg --print-foreign-architectures

你应该aarch64在外国建筑中看到。去掉它：

dpkg --remove-architecture aarch64

如果您收到此错误：

error: cannot remove architecture 'aarch64' currently in use by the database

您必须删除aarch64您拥有的所有软件包：

dpkg -l | grep aarch64

删除您发现的所有内容（带有sudo apt remove）

并再次尝试更新。

或者，如果您需要这些包，请保留外部架构，并配置源列表中抛出错误的每一行，以仅搜索您想要的架构中的包，例如添加[ arch=amd64 ]或类似：[ arch=i386,amd64 ]

deb [ arch=amd64 ] http://archive.ubuntu.com/ubuntu/ trusty-updates main