我是 ubuntu 新手。我刚刚安装了 ubuntu 14.1 和 windows 10。我安装了 64 位 amd-64(ubuntu)。当我尝试安装 Git 或 Java 或任何软件时，我需要输入命令sudo apt-get update。但它会获取很多东西并在中途停止并出现一些错误，如下所示
Ign http://in.archive.ubuntu.com utopic-updates/main Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-updates/main Translation-en
Ign http://in.archive.ubuntu.com utopic-updates/multiverse Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-updates/multiverse Translation-en
Ign http://in.archive.ubuntu.com utopic-updates/restricted Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-updates/restricted Translation-en
Ign http://in.archive.ubuntu.com utopic-updates/universe Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-updates/universe Translation-en
Err http://in.archive.ubuntu.com utopic-backports/restricted Sources
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/universe Sources
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/multiverse Sources
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/main Sources
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/restricted amd64 Packages
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/universe amd64 Packages
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/multiverse amd64 Packages
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/main amd64 Packages
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/restricted i386 Packages
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/universe i386 Packages
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/multiverse i386 Packages
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Err http://in.archive.ubuntu.com utopic-backports/main i386 Packages
404 Not Found [IP: 2001:67c:1560:8001::11 80]
Ign http://in.archive.ubuntu.com utopic-backports/main Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-backports/main Translation-en
Ign http://in.archive.ubuntu.com utopic-backports/multiverse Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-backports/multiverse Translation-en
Ign http://in.archive.ubuntu.com utopic-backports/restricted Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-backports/restricted Translation-en
Ign http://in.archive.ubuntu.com utopic-backports/universe Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-backports/universe Translation-en
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/restricted/source/Sources 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/main/source/Sources 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/universe/source/Sources 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/multiverse/source/Sources 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/restricted/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/universe/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/multiverse/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/restricted/binary-i386/Packages 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/main/binary-i386/Packages 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/universe/binary-i386/Packages 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/multiverse/binary-i386/Packages 404 Not Found [IP: 2001:67c:1562::16 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/restricted/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/main/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/universe/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/multiverse/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/restricted/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/universe/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/multiverse/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/restricted/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/main/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/universe/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/multiverse/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/restricted/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/main/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/universe/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/multiverse/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/restricted/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/universe/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/multiverse/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/restricted/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/main/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/universe/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/multiverse/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/restricted/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/universe/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/multiverse/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/main/source/Sources 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/restricted/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/universe/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/multiverse/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/restricted/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/universe/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/multiverse/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/main/binary-i386/Packages 404 Not Found [IP: 2001:67c:1560:8001::11 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
我已经看到了很多解决方案，但都没有用。请帮我找到可能的解决方案。提前谢谢
答案1
Ubuntu Utopic Unicorn 是生命尽头，不再支持。它已经停产两年多了。
从镜像中删除存储库是为了节省磁盘空间，因为无论如何都不会添加新的更新。
解决方案是更新到较新的版本，可以使用图形工具，也可以sudo do-release-upgrade在终端中执行。一个好的选择可能是重新安装较新的版本，因为这可能花费的时间更少。
如果您想要一个长期支持的环境，请考虑支持五年的 LTS 版本，而不是支持十个月的常规版本。
要成功地从 Utopic 更新到当前版本，请/etc/apt/sources.list以 root 身份使用您最喜欢的编辑器编辑您的。
替换http://in.archive.ubuntu.com/ubuntu为http://old-releases.ubuntu.com/ubuntu。完成此操作后，运行sudo apt-get update，然后您就可以尝试sudo do-release-upgrade。
当前的 LTS 16.04 预计将于 2021 年终止使用。