apt-get 时出现 /usr/lib/apt/methods/ttp could not be found

[believe_me]

$sudo apt-get update
E: The method driver /usr/lib/apt/methods/ttp could not be found.
我用的源是
deb http://ubuntu.uestc.edu.cn/ubuntu/ intrepid main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-backports main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-proposed main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-security main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ hardy-updates main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-backports main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-proposed main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-security main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ intrepid-updates main restricted universe multiverse

deb ttp://mirror.rootguide.org/ubuntu/ hardy main restricted

现在每次apt-get都出现标题的错误提示，无法正常安装软件了。
有没有人有过类似的情况阿，谢谢

[believe_me]

好像是比较少见的问题阿，没人帮忙额

[believe_me]

将
deb ttp://mirror.rootguide.org/ubuntu/ hardy main restricted
注释掉就可以了