1.报错：404 Not Found [IP: 91.189.88.151 80]
2.
deb http://old-releases.ubuntu.com/ubuntu/ raring main universe restricted multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring main universe restricted multiversedeb http://old-releases.ubuntu.com/ubuntu/ raring-security main universe restricted multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring-security main universe restricted multiversedeb http://old-releases.ubuntu.com/ubuntu/ raring-updates main universe restricted multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring-updates main universe restricted multiversedeb http://old-releases.ubuntu.com/ubuntu/ raring-backports main restricted universe multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring-backports main restricted universe multiversedeb http://old-releases.ubuntu.com/ubuntu/ raring-proposed main restricted universe multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring-proposed main restricted universe multiversetiny4412 ubuntudesktop更新源（old）
原文：http://www.cnblogs.com/zxouxuewei/p/5058269.html