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sudo apt-get update，会提示如下警告：

W: Duplicate sources.list entry http://archive.canonical.com/ubuntu/ precise/partner amd64 Packages (/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_precise_partner_binary-amd64_Packages) W: Duplicate sources.list entry http://archive.canonical.com/ubuntu/ precise/partner i386 Packages (/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_precise_partner_binary-i386_Packages) W: 您可能需要运行 apt-get update 来解决这些问题

解决方法：

进入/etc/apt/目录，将该目录下sources.list.d/及里面的内容全部删除，运行一下命令：

1sudo rm -r /etc/apt/sources.list.d/
2

然后重新运行：sudo apt-get update。

Form:http://hi.baidu.com/whugong8811wei/blog/item/e3bc6a1964e875398718bfe8.html