代码： 全选
sudo apt-get updata代码： 全选
命中 http://archive.ubuntu.com gutsy-backports/restricted Sources
命中 http://archive.ubuntu.com gutsy-backports/universe Sources
命中 http://archive.ubuntu.com gutsy-backports/multiverse Sources
下载 6960kB，耗时 1m55s (60.3kB/s)
正在读取软件包列表... 完成
W: Duplicate sources.list entry http://cn.archive.ubuntu.com gutsy/restricted Packages (/var/lib/apt/lists/cn.archive.ubuntu.com_ubuntu_dists_gutsy_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://cn.archive.ubuntu.com gutsy/multiverse Packages (/var/lib/apt/lists/cn.archive.ubuntu.com_ubuntu_dists_gutsy_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry http://cn.archive.ubuntu.com gutsy/multiverse Translation-zh_CN (/var/lib/apt/lists/cn.archive.ubuntu.com_ubuntu_dists_gutsy_multiverse_i18n_Translation-zh%5fCN)
W: Duplicate sources.list entry http://cn.archive.ubuntu.com gutsy-updates/restricted Packages (/var/lib/apt/lists/cn.archive.ubuntu.com_ubuntu_dists_gutsy-updates_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://cn.archive.ubuntu.com gutsy-updates/multiverse Packages (/var/lib/apt/lists/cn.archive.ubuntu.com_ubuntu_dists_gutsy-updates_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry http://cn.archive.ubuntu.com gutsy-security/restricted Packages (/var/lib/apt/lists/cn.archive.ubuntu.com_ubuntu_dists_gutsy-security_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://cn.archive.ubuntu.com gutsy-security/multiverse Packages (/var/lib/apt/lists/cn.archive.ubuntu.com_ubuntu_dists_gutsy-security_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry http://cn.archive.ubuntu.com gutsy-proposed/restricted Packages (/var/lib/apt/lists/cn.archive.ubuntu.com_ubuntu_dists_gutsy-proposed_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://cn.archive.ubuntu.com gutsy-proposed/multiverse Packages (/var/lib/apt/lists/cn.archive.ubuntu.com_ubuntu_dists_gutsy-proposed_multiverse_binary-i386_Packages)
W: 您可能需要运行 apt-get update 来解决这些问题