Ubuntu10.10这个版本真的很老了，官方N多年前早已不再支持更新软件源了。
目前可用的有中科大镜像更新源。
中科大Ubuntu 10.10源列表：
deb http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick main universe restricted multiverse deb-src http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick main universe restricted multiverse deb http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick-security universe main multiverse restricted deb-src http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick-security universe main multiverse restricted deb http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick-updates universe main multiverse restricted deb http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick-proposed universe main multiverse restricted deb-src http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick-proposed universe main multiverse restricted deb http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick-backports universe main multiverse restricted deb-src http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick-backports universe main multiverse restricted deb-src http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ maverick-updates universe main multiverse restricted
#sudo vi /etc/apt/sources.list
把原来的内容全都删掉，备份没啥意思反正都是用不了的了，然后直接把以上内容全部贴进保存即可。
原文：http://www.cnblogs.com/shazi909/p/4224711.html