http://blog.csdn.net/xie1xiao1jun/article/details/49911189
网上有很多关于软件源信息的更新，每次将它们copy到/etc/apt/sources.list中，且将copy下来的信息的版本名字修改为maverick，再运行sudo apt-get update，总会出现一连串的错误。后面经过搜索，才发现原来是ubuntu不在维护一些老版本的软件源了，因此无论怎么设置更新源都会出现错误。
因此目前对老版本的ubuntu软件源应该设置如下：
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
标注：版本的名字很多，如dapper, hardy, jaunty, karmic, lucid, maverick, natty等，可以通过 system-about ubuntu中查看