每当我尝试运行时，我都会收到此警告sudo apt-get update。
W: Duplicate sources.list entry http://archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_precise-updates_main_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems
以下是/etc/apt/sources.list文件的输出：
deb http://archive.ubuntu.com/ubuntu precise main restricted
deb-src http://archive.ubuntu.com/ubuntu precise main restricted
deb http://archive.ubuntu.com/ubuntu precise-updates main restricted
deb-src http://archive.ubuntu.com/ubuntu precise-updates main restricted
deb http://archive.ubuntu.com/ubuntu precise universe
deb-src http://archive.ubuntu.com/ubuntu precise universe
deb http://archive.ubuntu.com/ubuntu precise-updates universe
deb-src http://archive.ubuntu.com/ubuntu precise-updates universe
deb http://archive.ubuntu.com/ubuntu precise multiverse
deb-src http://archive.ubuntu.com/ubuntu precise multiverse
deb http://archive.ubuntu.com/ubuntu precise-updates multiverse
deb-src http://archive.ubuntu.com/ubuntu precise-updates …什么是sources.list？它像“注册”吗？
保持“清洁”有多重要？
当我做
sudo apt-get update
要显示的最后几行是这些：
W: Duplicate sources.list entry http://archive.canonical.com/ubuntu/ raring/partner amd64 Packages (/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_raring_partner_binary-amd64_Packages)
W: Duplicate sources.list entry http://archive.canonical.com/ubuntu/ raring/partner i386 Packages (/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_raring_partner_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems
我需要消除这些吗？
如果是这样，我是否只需找到该文件，将其备份，然后使用 gedit 进行编辑？
为埃里克编辑：
/etc/apt/sources.list:## 'partner' repository.
/etc/apt/sources.list:deb http://archive.canonical.com/ubuntu raring partner
/etc/apt/sources.list:# deb-src http://archive.canonical.com/ubuntu raring partner
/etc/apt/sources.list:## 'partner' repository.
/etc/apt/sources.list:deb http://archive.canonical.com/ubuntu raring partner
/etc/apt/sources.list:# deb-src http://archive.canonical.com/ubuntu raring partner
/etc/apt/sources.list.save:## 'partner' repository.
/etc/apt/sources.list.save:deb http://archive.canonical.com/ubuntu raring partner
/etc/apt/sources.list.save:# deb-src http://archive.canonical.com/ubuntu raring partner
/etc/apt/sources.list.save:## 'partner' …