like this.
ubuntu 8.10 no support? must upgrade?
bink@ubuntu:~$ sudo apt-get update
忽略 http://ubuntu.uestc.edu.cn intrepid Release.gpg
忽略 http://ubuntu.uestc.edu.cn intrepid/main Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid/restricted Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid/universe Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid/multiverse Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-backports Release.gpg
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/main Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/restricted Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/universe Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/multiverse Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed Release.gpg
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/main Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/restricted Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/universe Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/multiverse Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-security Release.gpg
忽略 http://ubuntu.uestc.edu.cn intrepid-security/main Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-security/restricted Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-security/universe Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-security/multiverse Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-updates Release.gpg
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/main Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/restricted Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/universe Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/multiverse Translation-zh_CN
忽略 http://ubuntu.uestc.edu.cn intrepid Release
忽略 http://ubuntu.uestc.edu.cn intrepid-backports Release
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed Release
忽略 http://ubuntu.uestc.edu.cn intrepid-security Release
忽略 http://ubuntu.uestc.edu.cn intrepid-updates Release
忽略 http://ubuntu.uestc.edu.cn intrepid/main Packages
忽略 http://ubuntu.uestc.edu.cn intrepid/restricted Packages
忽略 http://ubuntu.uestc.edu.cn intrepid/universe Packages
忽略 http://ubuntu.uestc.edu.cn intrepid/multiverse Packages
忽略 http://ubuntu.uestc.edu.cn intrepid/main Sources
忽略 http://ubuntu.uestc.edu.cn intrepid/restricted Sources
忽略 http://ubuntu.uestc.edu.cn intrepid/universe Sources
忽略 http://ubuntu.uestc.edu.cn intrepid/multiverse Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/main Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/restricted Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/universe Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/multiverse Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/main Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/restricted Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/universe Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-backports/multiverse Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/main Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/restricted Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/universe Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/multiverse Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/main Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/restricted Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/universe Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-proposed/multiverse Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-security/main Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-security/restricted Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-security/universe Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-security/multiverse Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-security/main Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-security/restricted Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-security/universe Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-security/multiverse Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/main Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/restricted Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/universe Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/multiverse Packages
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/main Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/restricted Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/universe Sources
忽略 http://ubuntu.uestc.edu.cn intrepid-updates/multiverse Sources
错误 http://ubuntu.uestc.edu.cn intrepid/main Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid/restricted Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid/universe Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid/multiverse Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid/main Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid/restricted Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid/universe Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid/multiverse Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-backports/main Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-backports/restricted Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-backports/universe Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-backports/multiverse Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-backports/main Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-backports/restricted Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-backports/universe Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-backports/multiverse Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-proposed/main Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-proposed/restricted Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-proposed/universe Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-proposed/multiverse Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-proposed/main Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-proposed/restricted Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-proposed/universe Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-proposed/multiverse Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-security/main Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-security/restricted Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-security/universe Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-security/multiverse Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-security/main Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-security/restricted Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-security/universe Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-security/multiverse Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-updates/main Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-updates/restricted Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-updates/universe Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-updates/multiverse Packages
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-updates/main Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-updates/restricted Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-updates/universe Sources
404 Not Found
错误 http://ubuntu.uestc.edu.cn intrepid-updates/multiverse Sources
404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... ackages.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
W: 无法下载 http://ubuntu.uestc.edu.cn/ubuntu/dists ... Sources.gz 404 Not Found
E: 有一些索引文件不能下载,它们可能被忽略了,也可能转而使用了旧的索引文件。