我正在使用 Ubuntu 11.10 64 位。当我尝试运行sudo apt-get update。终端中出现以下内容：
Hit http://archive.ubuntu.com oneiric-updates/restricted i386 Packages
Hit http://archive.ubuntu.com oneiric-updates/universe i386 Packages
Hit http://archive.ubuntu.com oneiric-updates/multiverse i386 Packages
Hit http://security.ubuntu.com oneiric-security/restricted Translation-en
Ign http://ppa.launchpad.net oneiric/main TranslationIndex
Hit http://toolbelt.heroku.com ./ Release
Ign http://extras.ubuntu.com oneiric/main TranslationIndex
Hit http://archive.ubuntu.com oneiric-updates/main TranslationIndex
Hit http://archive.ubuntu.com oneiric-updates/multiverse TranslationIndex
Hit http://archive.ubuntu.com oneiric-updates/restricted TranslationIndex
Hit http://archive.ubuntu.com oneiric-updates/universe TranslationIndex
Hit http://archive.ubuntu.com oneiric-backports/main amd64 Packages
Hit http://archive.ubuntu.com oneiric-backports/restricted amd64 Packages
Hit http://archive.ubuntu.com oneiric-backports/universe amd64 Packages
Hit http://security.ubuntu.com oneiric-security/universe Translation-en
Hit http://ppa.launchpad.net oneiric/main Sources
Hit http://ppa.launchpad.net oneiric/main amd64 Packages
Hit http://ppa.launchpad.net oneiric/main i386 Packages
Ign http://ppa.launchpad.net oneiric/main TranslationIndex
Hit http://archive.ubuntu.com oneiric-backports/multiverse amd64 Packages
Hit http://archive.ubuntu.com oneiric-backports/main i386 Packages
Hit http://archive.ubuntu.com oneiric-backports/restricted i386 Packages
Hit http://archive.ubuntu.com oneiric-backports/universe i386 Packages
Hit http://archive.ubuntu.com oneiric-backports/multiverse i386 Packages
Hit http://archive.ubuntu.com oneiric-backports/main TranslationIndex
Hit http://archive.ubuntu.com oneiric-backports/multiverse TranslationIndex
Hit http://archive.ubuntu.com oneiric-backports/restricted TranslationIndex
Hit http://archive.ubuntu.com oneiric-backports/universe TranslationIndex
Hit http://archive.ubuntu.com oneiric/main Translation-en
Hit http://archive.ubuntu.com oneiric/multiverse Translation-en
Hit http://archive.ubuntu.com oneiric/restricted Translation-en
Hit http://archive.ubuntu.com oneiric/universe Translation-en
Hit http://archive.ubuntu.com oneiric-updates/main Translation-en
Hit http://archive.ubuntu.com oneiric-updates/multiverse Translation-en
Hit http://archive.ubuntu.com oneiric-updates/restricted Translation-en
Hit http://archive.ubuntu.com oneiric-updates/universe Translation-en
Hit http://archive.ubuntu.com oneiric-backports/main Translation-en
Hit http://archive.ubuntu.com oneiric-backports/multiverse Translation-en
Hit http://archive.ubuntu.com oneiric-backports/restricted Translation-en
Hit http://archive.ubuntu.com oneiric-backports/universe Translation-en
Hit http://toolbelt.heroku.com ./ Packages
Ign http://deb.opera.com stable/non-free Translation-en_US
Ign http://deb.opera.com stable/non-free Translation-en
Ign http://archive.canonical.com oneiric/partner Translation-en_US
Ign http://linux.dropbox.com oneiric/main Translation-en_US
Err http://ppa.launchpad.net oneiric/main Sources
404 Not Found
Err http://ppa.launchpad.net oneiric/main amd64 Packages
404 Not Found
Ign http://archive.canonical.com oneiric/partner Translation-en
Ign http://archive.canonical.com oneiric/partner Translation-en_US
Ign http://linux.dropbox.com oneiric/main Translation-en
Err http://ppa.launchpad.net oneiric/main i386 Packages
404 Not Found
Ign http://archive.canonical.com oneiric/partner Translation-en
Ign http://dell.archive.canonical.com oneiric-dell/public Translation-en_US
Ign http://extras.ubuntu.com oneiric/main Translation-en_US
Ign http://dell.archive.canonical.com oneiric-dell/public Translation-en
Ign http://ppa.launchpad.net oneiric/main Translation-en_US
Ign http://extras.ubuntu.com oneiric/main Translation-en
Ign http://ppa.launchpad.net oneiric/main Translation-en
Ign http://ppa.launchpad.net oneiric/main Translation-en_US
Ign http://ppa.launchpad.net oneiric/main Translation-en
Ign http://ppa.launchpad.net oneiric/main Translation-en_US
Ign http://ppa.launchpad.net oneiric/main Translation-en
Ign http://ppa.launchpad.net oneiric/main Translation-en_US
Ign http://ppa.launchpad.net oneiric/main Translation-en
Ign http://ppa.launchpad.net oneiric/main Translation-en_US
Ign http://ppa.launchpad.net oneiric/main Translation-en
Ign http://ppa.launchpad.net oneiric/main Translation-en_US
Ign http://ppa.launchpad.net oneiric/main Translation-en
Ign http://toolbelt.heroku.com ./ Translation-en_US
Ign http://toolbelt.heroku.com ./ Translation-en
W: Failed to fetch http://ppa.launchpad.net/ferramroberto/filezilla/ubuntu/dists/oneiric/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/ferramroberto/filezilla/ubuntu/dists/oneiric/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/ferramroberto/filezilla/ubuntu/dists/oneiric/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
答案1
这是因为 11.10 已达到 EOL 并且不再受支持。我建议您至少升级到 12.04。但如果您的系统有能力的，您可能想要安装 13.04。
如果您决定升级，我建议您全新安装。确保备份所有数据。否则，您必须执行 11.10 --> 12.04 --> 12.10 --> 13.04
答案2
- 打开软件源。
- 单击“其他软件”选项卡。
- 查找所有错误的 PPA（例如http://ppa.launchpad.net/ferramroberto/filezilla/ubuntu /dists/oneiric/main/source/来源），删除前面的勾号，然后关闭窗口。
- 现在尝试正常更新。希望它能起作用。