apt-get update因404而失败
我最近开始在apt-get更新上获得404，之后没有特别有趣的改变，我知道。
dh@ubuntu:/etc/apt$ sudo apt-get update Ign file: InRelease Ign file: InRelease Ign file: InRelease Get:1 file: Release.gpg [198 B] Get:2 file: Release.gpg [181 B] Get:3 file: Release.gpg [181 B] Get:4 file: Release [196 B] Get:5 file: Release [191 B] Get:6 file: Release [195 B] Ign file: Translation-en_US Ign file: Translation-en Ign file: Translation-en_US Ign file: Translation-en Ign file: Translation-en_US Ign file: Translation-en Ign http://us.archive.ubuntu.com trusty InRelease Hit http://us.archive.ubuntu.com trusty-updates InRelease Ign http://extras.ubuntu.com trusty InRelease Hit http://security.ubuntu.com trusty-security InRelease Ign http://archive.canonical.com trusty InRelease Hit http://us.archive.ubuntu.com trusty-backports InRelease Hit http://us.archive.ubuntu.com trusty Release.gpg Hit http://extras.ubuntu.com trusty Release.gpg Hit http://archive.canonical.com trusty Release.gpg Hit http://security.ubuntu.com trusty-security/main amd64 Packages Hit http://us.archive.ubuntu.com trusty-updates/main amd64 Packages Hit http://extras.ubuntu.com trusty Release Hit http://archive.canonical.com trusty Release Hit http://us.archive.ubuntu.com trusty-updates/restricted amd64 Packages Hit http://security.ubuntu.com trusty-security/restricted amd64 Packages Hit http://us.archive.ubuntu.com trusty-updates/universe amd64 Packages Hit http://extras.ubuntu.com trusty/main Sources Hit http://security.ubuntu.com trusty-security/universe amd64 Packages Hit http://archive.canonical.com trusty/partner Sources Hit http://us.archive.ubuntu.com trusty-updates/multiverse amd64 Packages Hit http://extras.ubuntu.com trusty/main amd64 Packages Hit http://security.ubuntu.com trusty-security/multiverse amd64 Packages Hit http://archive.canonical.com trusty/partner amd64 Packages Hit http://archive.canonical.com trusty/partner armhf Packages Hit http://extras.ubuntu.com trusty/main i386 Packages Hit http://archive.canonical.com trusty/partner i386 Packages Hit http://us.archive.ubuntu.com trusty-updates/main i386 Packages Hit http://us.archive.ubuntu.com trusty-updates/restricted i386 Packages Hit http://us.archive.ubuntu.com trusty-updates/universe i386 Packages Hit http://us.archive.ubuntu.com trusty-updates/multiverse i386 Packages Hit http://us.archive.ubuntu.com trusty-updates/main Translation-en Hit http://us.archive.ubuntu.com trusty-updates/multiverse Translation-en Hit http://security.ubuntu.com trusty-security/main i386 Packages Ign http://archive.canonical.com trusty/partner Translation-en Hit http://us.archive.ubuntu.com trusty-updates/restricted Translation-en Hit http://security.ubuntu.com trusty-security/restricted i386 Packages Hit http://us.archive.ubuntu.com trusty-updates/universe Translation-en Hit http://us.archive.ubuntu.com trusty-backports/main amd64 Packages Hit http://security.ubuntu.com trusty-security/universe i386 Packages Hit http://us.archive.ubuntu.com trusty-backports/restricted amd64 Packages Hit http://us.archive.ubuntu.com trusty-backports/universe amd64 Packages Hit http://security.ubuntu.com trusty-security/multiverse i386 Packages Err http://extras.ubuntu.com trusty/main armhf Packages 404 Not Found [IP: 91.189.92.152 80] Hit http://us.archive.ubuntu.com trusty-backports/multiverse amd64 Packages Hit http://security.ubuntu.com trusty-security/main Translation-en Hit http://security.ubuntu.com trusty-security/multiverse Translation-en Hit http://security.ubuntu.com trusty-security/restricted Translation-en Hit http://us.archive.ubuntu.com trusty-backports/main i386 Packages Hit http://us.archive.ubuntu.com trusty-backports/restricted i386 Packages Hit http://security.ubuntu.com trusty-security/universe Translation-en Hit http://us.archive.ubuntu.com trusty-backports/universe i386 Packages Hit http://us.archive.ubuntu.com trusty-backports/multiverse i386 Packages Ign http://extras.ubuntu.com trusty/main Translation-en_US Hit http://us.archive.ubuntu.com trusty-backports/main Translation-en Ign http://extras.ubuntu.com trusty/main Translation-en Hit http://us.archive.ubuntu.com trusty-backports/multiverse Translation-en Hit http://us.archive.ubuntu.com trusty-backports/restricted Translation-en Hit http://us.archive.ubuntu.com trusty-backports/universe Translation-en Hit http://us.archive.ubuntu.com trusty Release Err http://security.ubuntu.com trusty-security/main armhf Packages 404 Not Found [IP: 91.189.92.200 80] Err http://security.ubuntu.com trusty-security/restricted armhf Packages 404 Not Found [IP: 91.189.92.200 80] Err http://security.ubuntu.com trusty-security/universe armhf Packages 404 Not Found [IP: 91.189.92.200 80] Err http://security.ubuntu.com trusty-security/multiverse armhf Packages 404 Not Found [IP: 91.189.92.200 80] Hit http://us.archive.ubuntu.com trusty/main Sources Hit http://us.archive.ubuntu.com trusty/restricted Sources Hit http://us.archive.ubuntu.com trusty/universe Sources Hit http://us.archive.ubuntu.com trusty/multiverse Sources Hit http://us.archive.ubuntu.com trusty/main amd64 Packages Hit http://us.archive.ubuntu.com trusty/universe amd64 Packages Hit http://us.archive.ubuntu.com trusty/restricted amd64 Packages Hit http://us.archive.ubuntu.com trusty/multiverse amd64 Packages Hit http://us.archive.ubuntu.com trusty/main i386 Packages Hit http://us.archive.ubuntu.com trusty/universe i386 Packages Hit http://us.archive.ubuntu.com trusty/restricted i386 Packages Hit http://us.archive.ubuntu.com trusty/multiverse i386 Packages Hit http://us.archive.ubuntu.com trusty/main Translation-en Hit http://us.archive.ubuntu.com trusty/multiverse Translation-en Hit http://us.archive.ubuntu.com trusty/restricted Translation-en Hit http://us.archive.ubuntu.com trusty/universe Translation-en Err http://us.archive.ubuntu.com trusty-updates/main armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty-updates/restricted armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty-updates/universe armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty-updates/multiverse armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty-backports/main armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty-backports/restricted armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty-backports/universe armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty-backports/multiverse armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty/main armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty/universe armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty/restricted armhf Packages 404 Not Found [IP: 91.189.91.24 80] Err http://us.archive.ubuntu.com trusty/multiverse armhf Packages 404 Not Found [IP: 91.189.91.24 80] Ign http://us.archive.ubuntu.com trusty/main Translation-en_US Ign http://us.archive.ubuntu.com trusty/multiverse Translation-en_US Ign http://us.archive.ubuntu.com trusty/restricted Translation-en_US Ign http://us.archive.ubuntu.com trusty/universe Translation-en_US W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-updates/restricted/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-updates/multiverse/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/main/binary-armhf/Packages 404 Not Found [IP: 91.189.92.200 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/restricted/binary-armhf/Packages 404 Not Found [IP: 91.189.92.200 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/universe/binary-armhf/Packages 404 Not Found [IP: 91.189.92.200 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/multiverse/binary-armhf/Packages 404 Not Found [IP: 91.189.92.200 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-backports/main/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-backports/restricted/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-backports/universe/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-backports/multiverse/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/trusty/main/binary-armhf/Packages 404 Not Found [IP: 91.189.92.152 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty/main/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty/universe/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty/restricted/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty/multiverse/binary-armhf/Packages 404 Not Found [IP: 91.189.91.24 80] E: Some index files failed to download. They have been ignored, or old ones used instead. 我的/etc/apt/sources.list包含：
deb http://archive.canonical.com/ubuntu trusty partner deb-src http://archive.canonical.com/ubuntu trusty partner deb http://extras.ubuntu.com/ubuntu trusty main deb-src http://extras.ubuntu.com/ubuntu trusty main # deb http://linux.dropbox.com/ubuntu trusty main # deb-src http://linux.dropbox.com/ubuntu trusty main deb http://us.archive.ubuntu.com/ubuntu/ trusty main universe restricted multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse #Added by software-properties deb http://security.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse deb http://us.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
对我来说有点奇怪的是，鉴于我在x86上，更新看起来像是试图攻击ARM源：
dh@ubuntu:/etc/apt$ arch x86_64
可能这与我刚从这台Ubuntu机器上的Jetson TK1（即ARMHF）上交叉编译和安装JetPack的事实有关吗？ 狂野的猜测在那里。
事实上，丢失的远程文件确实丢失了，但是，呃，我是怎么出错的，怎么回来……？
谢谢你的任何建议！
担
您的系统已将armhf架构作为外部架构添加到其中。
dpkg --remove-architecture armhf
应该清除问题。 之后进行“apt-get update”，问题应该消失。