我看到右上角有一个带有感叹号的红色三角形。
我运行sudo apt-get update后发现输出中有以下几行：
Hit http://in.archive.ubuntu.com trusty/main amd64 Packages
Hit http://in.archive.ubuntu.com trusty/restricted amd64 Packages
Ign http://download.videolan.org Translation-en_IN
Hit http://in.archive.ubuntu.com trusty/universe amd64 Packages
Hit http://in.archive.ubuntu.com trusty/multiverse amd64 Packages
Ign http://download.videolan.org Translation-en
Hit http://in.archive.ubuntu.com trusty/main i386 Packages
Err http://archive.getdeb.net trusty-getdeb/games amd64 Packages
Hit http://in.archive.ubuntu.com trusty/restricted i386 Packages
Err http://download.videolan.org Sources
403 Forbidden [IP: 88.191.250.2 80]
Hit http://in.archive.ubuntu.com trusty/universe i386 Packages
Hit http://in.archive.ubuntu.com trusty/multiverse i386 Packages
Err http://archive.getdeb.net trusty-getdeb/apps i386 Packages
Err http://download.videolan.org Packages
403 Forbidden [IP: 88.191.250.2 80]
Hit http://in.archive.ubuntu.com trusty/main Translation-en
Err http://archive.getdeb.net trusty-getdeb/games i386 Packages
Hit http://in.archive.ubuntu.com trusty/multiverse Translation-en
Hit http://in.archive.ubuntu.com trusty/restricted Translation-en
Hit http://in.archive.ubuntu.com trusty/universe Translation-en
Err http://archive.getdeb.net trusty-getdeb/apps amd64 Packages
Ign http://in.archive.ubuntu.com trusty/main Translation-en_IN
Ign http://in.archive.ubuntu.com trusty/multiverse Translation-en_IN
Ign http://in.archive.ubuntu.com trusty/restricted Translation-en_IN
Err http://archive.getdeb.net trusty-getdeb/games amd64 Packages
Ign http://in.archive.ubuntu.com trusty/universe Translation-en_IN
Err http://archive.getdeb.net trusty-getdeb/apps i386 Packages
Err http://archive.getdeb.net trusty-getdeb/games i386 Packages
Err http://archive.getdeb.net trusty-getdeb/apps amd64 Packages
Err http://archive.getdeb.net trusty-getdeb/games amd64 Packages
Err http://archive.getdeb.net trusty-getdeb/apps i386 Packages
Err http://archive.getdeb.net trusty-getdeb/games i386 Packages
Err http://archive.getdeb.net trusty-getdeb/apps amd64 Packages
Err http://archive.getdeb.net trusty-getdeb/games amd64 Packages
Err http://archive.getdeb.net trusty-getdeb/apps i386 Packages
Err http://archive.getdeb.net trusty-getdeb/games i386 Packages
Ign http://archive.getdeb.net trusty-getdeb/apps Translation-en_IN
Ign http://archive.getdeb.net trusty-getdeb/apps Translation-en
Ign http://archive.getdeb.net trusty-getdeb/games Translation-en_IN
Ign http://archive.getdeb.net trusty-getdeb/games Translation-en
Err http://archive.getdeb.net trusty-getdeb/apps amd64 Packages
403 Forbidden [IP: 104.28.24.125 80]
Err http://archive.getdeb.net trusty-getdeb/games amd64 Packages
403 Forbidden [IP: 104.28.24.125 80]
Err http://archive.getdeb.net trusty-getdeb/apps i386 Packages
403 Forbidden [IP: 104.28.24.125 80]
Err http://archive.getdeb.net trusty-getdeb/games i386 Packages
403 Forbidden [IP: 104.28.24.125 80]
W: Failed to fetch http://download.videolan.org/pub/debian/stable/Sources 403 Forbidden [IP: 88.191.250.2 80]
W: Failed to fetch http://download.videolan.org/pub/debian/stable/Packages 403 Forbidden [IP: 88.191.250.2 80]
W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/trusty-getdeb/apps/binary-amd64/Packages 403 Forbidden [IP: 104.28.24.125 80]
W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/trusty-getdeb/games/binary-amd64/Packages 403 Forbidden [IP: 104.28.24.125 80]
W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/trusty-getdeb/apps/binary-i386/Packages 403 Forbidden [IP: 104.28.24.125 80]
W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/trusty-getdeb/games/binary-i386/Packages 403 Forbidden [IP: 104.28.24.125 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
答案1
因此，您所有的主要档案都更新正常，并且您将继续从它们获得更新。
我看到的唯一问题是，它download.videolan.org似乎archive.getdeb.net不可用。也许他们改变了他们的存储库格式。也许他们已经完全撤回了它们。如果你想知道确切情况，请咨询存储库的提供商。
如果您找不到任何信息，删除这些损坏的存储库将会导致警告消失。
但同样，这不会干扰 Ubuntu 提供的软件包和更新。