有人可以为 Ubuntu 15.04 提供真实、正确和真实的 source.list 吗？

Question

我已经使用 Ubuntu 一段时间了，我遇到了所有问题，我不需要发布一个线程来获取答案，直到我最近升级到 Ubuntu Vivid。

Ubuntu 很棒，但每次运行时sudo apt-get update我都会平稳运行更新，它会返回/var/lib/apt/lists.

这甚至不是问题所在。非常令人沮丧的是，即使我运行建议的更新，它仍然产生相同的结果。

我使用的是 Ubuntu 14.04，然后在升级到 Vivid 之前升级到 Ubuntu Utopic。

我所需要的只是请提供一份没有重复源列表的契约。

请。

谢谢大家。

编辑：这是我从重新加载软件属性-gtk 中得到的新错误。

W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ vivid-security/restricted i386 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_vivid-security_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ vivid-security/universe i386 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_vivid-security_universe_binary-i386_Packages)
W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ vivid-security/multiverse i386 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_vivid-security_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ vivid-security/main i386 Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_vivid-security_main_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems

Answer 1

这是我的处女 sources.list

当sources.list文件夹中的文件中包含条目时，也会出现重复项/etc/apt/sources.list.d。

# deb cdrom:[Ubuntu-GNOME 15.04 _Vivid Vervet_ - Alpha amd64 (20150316)]/ vivid main multiverse restricted universe

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://archive.ubuntu.com/ubuntu vivid main restricted
deb-src http://archive.ubuntu.com/ubuntu vivid main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu vivid-updates main restricted
deb-src http://archive.ubuntu.com/ubuntu vivid-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu vivid universe
deb-src http://archive.ubuntu.com/ubuntu vivid universe
deb http://archive.ubuntu.com/ubuntu vivid-updates universe
deb-src http://archive.ubuntu.com/ubuntu vivid-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://archive.ubuntu.com/ubuntu vivid multiverse
deb-src http://archive.ubuntu.com/ubuntu vivid multiverse
deb http://archive.ubuntu.com/ubuntu vivid-updates multiverse
deb-src http://archive.ubuntu.com/ubuntu vivid-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu vivid-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu vivid-backports main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu vivid-security main restricted
deb-src http://archive.ubuntu.com/ubuntu vivid-security main restricted
deb http://archive.ubuntu.com/ubuntu vivid-security universe
deb-src http://archive.ubuntu.com/ubuntu vivid-security universe
deb http://archive.ubuntu.com/ubuntu vivid-security multiverse
deb-src http://archive.ubuntu.com/ubuntu vivid-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu vivid partner
# deb-src http://archive.canonical.com/ubuntu vivid partner

您可以使用Y PPA Manager删除重复项：

sudo add-apt-repository ppa:webupd8team/y-ppa-manager
sudo apt-get update
sudo apt-get install y-ppa-manager

运行Y PPA 管理器

选择高级

选择扫描并删除重复的 PPA

完成后，然后开始更新：

sudo apt-get update

Answer 2

这应该可以（确保替换us为您的国家/地区前缀）：

deb http://us.archive.ubuntu.com/ubuntu/ vivid main universe restricted multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ vivid main universe restricted multiverse

deb http://us.archive.ubuntu.com/ubuntu/ vivid-security main universe restricted multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ vivid-security main universe restricted multiverse

deb http://us.archive.ubuntu.com/ubuntu/ vivid-updates main universe restricted multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ vivid-updates main universe restricted multiverse