10.10去年就停止支持了，11.10今年停止支持，赶紧更新吧。或者lts版可以多用几年，最新的LTS 12.04可以支持到2017年。
只想用10.10的话，可以自己改下apt配置。
编辑 /etc/apt/sources.list 文件
改为如下：
deb http://old-releases.ubuntu.com/ubuntu maverick main
deb-src http://old-releases.ubuntu.com/ubuntu maverick main
deb http://old-releases.ubuntu.com/ubuntu maverick main universe restricted multiverse
deb-src http://old-releases.ubuntu.com/ubuntu maverick main universe restricted multiverse
deb http://old-releases.ubuntu.com/ubuntu maverick-security universe main multiverse restricted
deb-src http://old-releases.ubuntu.com/ubuntu maverick-security universe main multiverse restricted
deb http://old-releases.ubuntu.com/ubuntu maverick-updates universe main multiverse restricted
deb http://old-releases.ubuntu.com/ubuntu maverick-proposed universe main multiverse restricted
deb-src http://old-releases.ubuntu.com/ubuntu maverick-proposed universe main multiverse restricted
deb http://old-releases.ubuntu.com/ubuntu maverick-backports universe main multiverse restricted
deb-src http://old-releases.ubuntu.com/ubuntu maverick-backports universe main multiverse restricted
deb-src http://old-releases.ubuntu.com/ubuntu maverick-updates universe main multiverse restricted