我正在尝试从 ubuntu 软件中心下载一个软件，并得到以下屏幕。
如果我点击使用此来源，我会得到
就是这样，软件没有安装。显然，Ubuntu 软件中心的所有软件都出现了这种情况。
输出sudo apt-get update
Err http://in.old-releases.ubuntu.com utopic InRelease
Err http://in.old-releases.ubuntu.com utopic Release.gpg
Could not resolve 'in.old-releases.ubuntu.com'
Ign http://dl.google.com stable InRelease
Hit http://dl.google.com stable Release.gpg
Hit http://dl.google.com stable Release
Ign http://extras.ubuntu.com utopic InRelease
Ign http://archive.ubuntu.com utopic InRelease
Hit http://dl.google.com stable/main i386 Packages
Hit http://extras.ubuntu.com utopic Release.gpg
Ign http://archive.ubuntu.com utopic Release.gpg
Hit http://extras.ubuntu.com utopic Release
Ign http://archive.ubuntu.com utopic Release
Hit http://extras.ubuntu.com utopic/main Sources
Ign http://dl.google.com stable/main Translation-en_IN
Ign http://dl.google.com stable/main Translation-en
Hit http://extras.ubuntu.com utopic/main i386 Packages
Ign http://extras.ubuntu.com utopic/main Translation-en_IN
Ign http://extras.ubuntu.com utopic/main Translation-en
Ign http://ppa.launchpad.net utopic InRelease
Hit http://ppa.launchpad.net trusty InRelease
Hit http://ppa.launchpad.net trusty InRelease
Get:1 http://ppa.launchpad.net utopic InRelease [15.5 kB]
Ign http://ppa.launchpad.net utopic InRelease
Hit http://ppa.launchpad.net trusty InRelease
Ign http://ppa.launchpad.net utopic InRelease
Ign http://ppa.launchpad.net trusty InRelease
Hit http://ppa.launchpad.net trusty InRelease
Err http://archive.ubuntu.com utopic/main i386 Packages
404 Not Found [IP: 91.189.91.23 80]
Ign http://ppa.launchpad.net utopic Release.gpg
Err http://archive.ubuntu.com utopic/universe i386 Packages
404 Not Found [IP: 91.189.91.23 80]
Ign http://archive.ubuntu.com utopic/main Translation-en_IN
Ign http://archive.ubuntu.com utopic/main Translation-en
Ign http://archive.ubuntu.com utopic/universe Translation-en_IN
Get:2 http://ppa.launchpad.net utopic/main i386 Packages [8,542 B]
Get:3 http://ppa.launchpad.net utopic/main Translation-en [3,070 B]
Ign http://archive.ubuntu.com utopic/universe Translation-en
Hit http://ppa.launchpad.net utopic Release.gpg
Hit http://ppa.launchpad.net utopic Release.gpg
Hit http://ppa.launchpad.net trusty Release.gpg
Ign http://ppa.launchpad.net utopic Release
Hit http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Hit http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Hit http://ppa.launchpad.net utopic Release
Hit http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Hit http://ppa.launchpad.net utopic Release
Hit http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Hit http://ppa.launchpad.net utopic/main i386 Packages
Hit http://ppa.launchpad.net utopic/main Translation-en
Hit http://ppa.launchpad.net utopic/main i386 Packages
Hit http://ppa.launchpad.net utopic/main Translation-en
Hit http://ppa.launchpad.net trusty/main i386 Packages
Err http://ppa.launchpad.net utopic/main i386 Packages
404 Not Found
Ign http://ppa.launchpad.net utopic/main Translation-en_IN
Ign http://ppa.launchpad.net utopic/main Translation-en
Ign http://ppa.launchpad.net trusty/main Translation-en_IN
Ign http://ppa.launchpad.net trusty/main Translation-en
Fetched 27.1 kB in 21s (1,279 B/s)
Reading package lists... Done
W: Failed to fetch http://in.old-releases.ubuntu.com/ubuntu/dists/utopic/InRelease
W: Failed to fetch http://in.old-releases.ubuntu.com/ubuntu/dists/utopic/Release.gpg Could not resolve 'in.old-releases.ubuntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/utopic/main/binary-i386/Packages 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/utopic/universe/binary-i386/Packages 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://ppa.launchpad.net/inameiname/stable/ubuntu/dists/utopic/main/binary-i386/Packages 404 Not Found
W: Some index files failed to download. They have been ignored, or old ones used instead.
输出cat /etc/*release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.10
DISTRIB_CODENAME=utopic
DISTRIB_DESCRIPTION="Ubuntu 14.10"
NAME="Ubuntu"
VERSION="14.10 (Utopic Unicorn)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.10"
VERSION_ID="14.10"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
答案1
如您所见，您的版本已过期。经过我们的讨论，在聊天中，我们已确定您将下载并安装 14.04，并保留分区/home。要下载 14.04，请单击这里。
答案2
我确实找到了解决问题的方法。我使用的是 Ubuntu 14.10，它已经到了 EOL 阶段，所以我必须升级我的 ubuntu 才能安装任何软件。
还有另一种方法，无需升级操作系统，只需按照此链接中的说明操作即可https://superuser.com/a/339572编辑 sources.list 文件。之后我就可以从 ubuntu 软件中心安装任何软件了。