解决Ubuntu kylin14.04下apt-get update警告Duplicate sources.list entry问题
这两天 apt-get update 升级 Ubuntu kylin 14.04 中文界面系统时，出现以下问题 W: Duplicate sources.list entry http://archive.ubuntukylin.com:10006/ubuntukylin/ trusty/main amd64 Packages (/var/lib/apt/lists/archive.ubuntukylin.com:10006_ubuntukylin_dists_trusty_main_binary-amd64_Packages)
W: Duplicate sources.list entry http://archive.ubuntukylin.com:10006/ubuntukylin/ trusty/main i386 Packages (/var/lib/apt/lists/archive.ubuntukylin.com:10006_ubuntukylin_dists_trusty_main_binary-i386_Packages) 致 apt-get dist-upgrade 无法使用，具体如下所示：
root:# apt-get update
忽略 http://cn.archive.ubuntu.com trusty InRelease
命中 http://cn.archive.ubuntu.com trusty-updates InRelease
命中 http://cn.archive.ubuntu.com trusty-backports InRelease
命中 http://cn.archive.ubuntu.com trusty Release.gpg
忽略 http://archive.ubuntukylin.com:10006 trusty InRelease
命中 http://archive.ubuntukylin.com:10006 trusty Release.gpg
命中 http://cn.archive.ubuntu.com trusty Release
命中 http://archive.ubuntukylin.com:10006 trusty Release
命中 http://security.ubuntu.com trusty-security InRelease
命中 http://cn.archive.ubuntu.com trusty-updates/main Sources
命中 http://cn.archive.ubuntu.com trusty-updates/restricted Sources
命中 http://cn.archive.ubuntu.com trusty-updates/universe Sources
命中 http://archive.ubuntukylin.com:10006 trusty/main amd64 Packages
命中 http://cn.archive.ubuntu.com trusty-updates/multiverse Sources
命中 http://archive.ubuntukylin.com:10006 trusty/main i386 Packages
命中 http://cn.archive.ubuntu.com trusty-updates/main amd64 Packages
忽略 http://archive.ubuntukylin.com:10006 trusty/main Translation-en
命中 http://cn.archive.ubuntu.com trusty-updates/restricted amd64 Packages
命中 http://cn.archive.ubuntu.com trusty-updates/universe amd64 Packages
命中 http://security.ubuntu.com trusty-security/main Sources
命中 http://cn.archive.ubuntu.com trusty-updates/multiverse amd64 Packages
命中 http://cn.archive.ubuntu.com trusty-updates/main i386 Packages
命中 http://cn.archive.ubuntu.com trusty-updates/restricted i386 Packages
命中 http://cn.archive.ubuntu.com trusty-updates/universe i386 Packages
命中 http://cn.archive.ubuntu.com trusty-updates/multiverse i386 Packages
命中 http://cn.archive.ubuntu.com trusty-updates/main Translation-en
命中 http://security.ubuntu.com trusty-security/restricted Sources
命中 http://cn.archive.ubuntu.com trusty-updates/multiverse Translation-en
命中 http://cn.archive.ubuntu.com trusty-updates/restricted Translation-en
命中 http://cn.archive.ubuntu.com trusty-updates/universe Translation-en
命中 http://cn.archive.ubuntu.com trusty-backports/main Sources
命中 http://cn.archive.ubuntu.com trusty-backports/restricted Sources
命中 http://cn.archive.ubuntu.com trusty-backports/universe Sources
命中 http://security.ubuntu.com trusty-security/universe Sources
命中 http://cn.archive.ubuntu.com trusty-backports/multiverse Sources
命中 http://cn.archive.ubuntu.com trusty-backports/main amd64 Packages
命中 http://cn.archive.ubuntu.com trusty-backports/restricted amd64 Packages
命中 http://cn.archive.ubuntu.com trusty-backports/universe amd64 Packages
命中 http://cn.archive.ubuntu.com trusty-backports/multiverse amd64 Packages
命中 http://cn.archive.ubuntu.com trusty-backports/main i386 Packages
命中 http://cn.archive.ubuntu.com trusty-backports/restricted i386 Packages
命中 http://security.ubuntu.com trusty-security/multiverse Sources
命中 http://cn.archive.ubuntu.com trusty-backports/universe i386 Packages
命中 http://cn.archive.ubuntu.com trusty-backports/multiverse i386 Packages
命中 http://cn.archive.ubuntu.com trusty-backports/main Translation-en
命中 http://cn.archive.ubuntu.com trusty-backports/multiverse Translation-en
命中 http://cn.archive.ubuntu.com trusty-backports/restricted Translation-en
命中 http://cn.archive.ubuntu.com trusty-backports/universe Translation-en
命中 http://cn.archive.ubuntu.com trusty/main Sources
命中 http://security.ubuntu.com trusty-security/main amd64 Packages
命中 http://cn.archive.ubuntu.com trusty/restricted Sources
命中 http://cn.archive.ubuntu.com trusty/universe Sources
命中 http://cn.archive.ubuntu.com trusty/multiverse Sources
命中 http://cn.archive.ubuntu.com trusty/main amd64 Packages
命中 http://cn.archive.ubuntu.com trusty/restricted amd64 Packages
命中 http://cn.archive.ubuntu.com trusty/universe amd64 Packages
命中 http://cn.archive.ubuntu.com trusty/multiverse amd64 Packages
命中 http://cn.archive.ubuntu.com trusty/main i386 Packages
命中 http://security.ubuntu.com trusty-security/restricted amd64 Packages
命中 http://cn.archive.ubuntu.com trusty/restricted i386 Packages
命中 http://cn.archive.ubuntu.com trusty/universe i386 Packages
命中 http://cn.archive.ubuntu.com trusty/multiverse i386 Packages
命中 http://cn.archive.ubuntu.com trusty/main Translation-zh_CN
命中 http://cn.archive.ubuntu.com trusty/main Translation-en
命中 http://cn.archive.ubuntu.com trusty/multiverse Translation-zh_CN
命中 http://security.ubuntu.com trusty-security/universe amd64 Packages
命中 http://cn.archive.ubuntu.com trusty/multiverse Translation-en
命中 http://cn.archive.ubuntu.com trusty/restricted Translation-zh_CN
命中 http://cn.archive.ubuntu.com trusty/restricted Translation-en
命中 http://cn.archive.ubuntu.com trusty/universe Translation-zh_CN
命中 http://security.ubuntu.com trusty-security/multiverse amd64 Packages
命中 http://cn.archive.ubuntu.com trusty/universe Translation-en
忽略 http://cn.archive.ubuntu.com trusty/main Translation-zh
忽略 http://cn.archive.ubuntu.com trusty/multiverse Translation-zh
忽略 http://cn.archive.ubuntu.com trusty/restricted Translation-zh
忽略 http://cn.archive.ubuntu.com trusty/universe Translation-zh
命中 http://security.ubuntu.com trusty-security/main i386 Packages
命中 http://security.ubuntu.com trusty-security/restricted i386 Packages
命中 http://security.ubuntu.com trusty-security/universe i386 Packages
命中 http://security.ubuntu.com trusty-security/multiverse i386 Packages
命中 http://security.ubuntu.com trusty-security/main Translation-en
命中 http://security.ubuntu.com trusty-security/multiverse Translation-en
命中 http://security.ubuntu.com trusty-security/restricted Translation-en
命中 http://security.ubuntu.com trusty-security/universe Translation-en
正在读取软件包列表... 完成
W: Duplicate sources.list entry http://archive.ubuntukylin.com:10006/ubuntukylin/ trusty/main amd64 Packages (/var/lib/apt/lists/archive.ubuntukylin.com:10006_ubuntukylin_dists_trusty_main_binary-amd64_Packages)
W: Duplicate sources.list entry http://archive.ubuntukylin.com:10006/ubuntukylin/ trusty/main i386 Packages (/var/lib/apt/lists/archive.ubuntukylin.com:10006_ubuntukylin_dists_trusty_main_binary-i386_Packages)
W: 您可能需要运行 apt-get update 来解决这些问题
root:#
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快速解决办法
递归移除 /etc/apt/sources.list.d/ 目录下的所有文件及目录
rm -r /etc/apt/sources.list.d/
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http://askubuntu.com/questions/120621/how-to-fix-duplicate-sources-list-entry
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