2.sudo apt-get update 更新源列表信息
3.sudo apt-get upgrade 升 级或者用ubuntu自带的更新管理器升级也可
Ubuntu 10.04源列表：
网易（速度很快）
复制代码代码如下:
搜狐
复制代码代码如下:
SRT Sources
复制代码代码如下:
ubuntu官方上海源
复制代码代码如下:
deb http://mirror.rootguide.org/ubuntu/ lucid main universe restricted multiverse
deb-src http://mirror.rootguide.org/ubuntu/ lucid main universe restricted multiverse
deb http://mirror.rootguide.org/ubuntu/ lucid-security universe main multiverse restricted
deb-src http://mirror.rootguide.org/ubuntu/ lucid-security universe main multiverse restricted
deb http://mirror.rootguide.org/ubuntu/ lucid-updates universe main multiverse restricted
deb http://mirror.rootguide.org/ubuntu/ lucid-proposed universe main multiverse restricted
deb-src http://mirror.rootguide.org/ubuntu/ lucid-proposed universe main multiverse restricted
deb http://mirror.rootguide.org/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://mirror.rootguide.org/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://mirror.rootguide.org/ubuntu/ lucid-updates universe main multiverse restricted