无法下载存储库信息（错误的sources.list条目或格式错误的文件）
尝试更新包列表时，我收到以下错误日志：
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apt-get clean和autoclean ， 更换服务器 ，甚至删除架构 （但dpkg说我不能，因为它正在被数据库使用）。 还试图删除包含有问题的条目的行，但我的sources.list不包含它们。 当我做cat /etc/apt/sources.list /etc/apt/sources.list.d/*这是我得到的：
# 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 ## NB 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 ## NB 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 ## NB 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 /
这也与建议的重复不同 – 我的错误日志不包含损坏行的索引。 实际上，我的sources.list甚至不包含类似于消息中提到的条目。
我该怎么办？
根据这个错误：
Unable to find expected entry 'main/binary-aarch64/Packages'
您已添加aarch64体系结构，但存储库没有该体系结构的包。
校验：
dpkg --print-architecture
和
dpkg --print-foreign-architectures
你应该在外国架构中看到aarch64 。 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
您将不得不删除任何aarch64包：
dpkg -l | grep aarch64
删除你找到的任何东西（使用sudo apt remove ）
并尝试再次更新。
或者， 如果您需要这些软件包 ，请保留外部体系结构，并通过添加[ arch=amd64 ]或[ arch=i386,amd64 ]来配置源列表中每行引发错误以仅搜索所需体系结构的软件包。像这样，例如：
deb [ arch=amd64 ] http://archive.ubuntu.com/ubuntu/ trusty-updates main