重裝ubuntu后，更新速度一直上不去，然后隨便從網上copy了一些源加進來，結果更新速度還是很慢。
覺得不舒服，仔細比較了源后，發(fā)現原來源是有版本區(qū)別的！！！！自己狂汗一陣。
然后專門搜索了9.04的源，速度大增：原來一周才能更新好的東西，一小時就解決了。

此次所得，特銘文記之。
備份source.list，官方給配置的，不用也罷──刪除。
用下面的源建立新的source.list

============================
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty-backports restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty-security main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu/ jaunty-updates main restricted universe multiverse

deb http://tw.archive.Ubuntu.com/ubuntu jaunty main restricted universe multiverse
deb http://tw.archive.Ubuntu.com/ubuntu jaunty-security main restricted universe multiverse
deb http://tw.archive.Ubuntu.com/ubuntu jaunty-updates main restricted universe multiverse
deb http://tw.archive.Ubuntu.com/ubuntu jaunty-backports main restricted universe multiverse
deb http://tw.archive.Ubuntu.com/ubuntu jaunty-proposed main restricted universe multiverse
deb-src http://tw.archive.Ubuntu.com/ubuntu jaunty main restricted universe multiverse
deb-src http://tw.archive.Ubuntu.com/ubuntu jaunty-security main restricted universe multiverse
deb-src http://tw.archive.Ubuntu.com/ubuntu jaunty-updates main restricted universe multiverse
deb-src http://tw.archive.Ubuntu.com/ubuntu jaunty-backports main restricted universe multiverse
deb-src http://tw.archive.Ubuntu.com/ubuntu jaunty-proposed main restricted universe multiverse

deb http://mirrors.163.com/ubuntu/ jaunty main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ jaunty-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ jaunty-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ jaunty-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ jaunty-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jaunty main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jaunty-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jaunty-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ jaunty-backports main restricted universe multiverse

^分別是北交源，臺灣源，163源。對我來說速度從高到低，還是學校好啊。

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軟推：
iptux，linux下的飛鴿，和win下的飛鴿互通，但功能更強大。
tee，既輸出到屏幕也輸出到文件。