ubuntu11.04 默认源不能用，用这个源代替

备份/etc/apt/sources.list

打开sources.list，用下面的源替换

## Major bug fix updates produced after the final release of the  

## distribution.  

deb http://old-releases.ubuntu.com/ubuntu/ maverick main restricted

deb-src http://old-releases.ubuntu.com/ubuntu/ maverick main restricted

deb http://old-releases.ubuntu.com/ubuntu/ maverick-updates main restricted

deb-src http://old-releases.ubuntu.com/ubuntu/ maverick-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu  

## team. Also, please note that software in universe WILL NOT receive any  

## review or updates from the Ubuntu security team.  

deb http://old-releases.ubuntu.com/ubuntu/ maverick universe

deb-src http://old-releases.ubuntu.com/ubuntu/ maverick universe

deb http://old-releases.ubuntu.com/ubuntu/ maverick-updates universe

deb-src http://old-releases.ubuntu.com/ubuntu/ maverick-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu  

## team, and may not be under a free licence. Please satisfy yourself as to  

## your rights to use the software. Also, please note that software in  

## multiverse WILL NOT receive any review or updates from the Ubuntu  

## security team.  

deb http://old-releases.ubuntu.com/ubuntu/ maverick multiverse

deb-src http://old-releases.ubuntu.com/ubuntu/ maverick multiverse

deb http://old-releases.ubuntu.com/ubuntu/ maverick-updates multiverse

deb-src http://old-releases.ubuntu.com/ubuntu/ maverick-updates multiverse

## Uncomment the following two lines to add software from the 'backports'  

## repository.  

## N.B. software from this repository may not have been tested as  

## extensively as that contained in the main release, although it includes  

## newer versions of some applications which may provide useful features.  

## Also, please note that software in backports WILL NOT receive any review  

## or updates from the Ubuntu security team.  

# deb http://us.old-releases.ubuntu.com/ubuntu/ maverick-backports main restricted universe multiverse

# deb-src http://us.old-releases.ubuntu.com/ubuntu/ maverick-backports main restricted universe multiverse

#remastersys for backup installed system  

deb http://www.remastersys.com/ubuntu maverick main

deb http://mirror.lupaworld.com/ubuntu/ natty main restricted

deb-src http://mirror.lupaworld.com/ubuntu/ natty main restricted

deb http://mirror.lupaworld.com/ubuntu/ natty-updates main restricted

deb-src http://mirror.lupaworld.com/ubuntu/ natty-updates main restricted

deb http://mirror.lupaworld.com/ubuntu/ natty universe

deb-src http://mirror.lupaworld.com/ubuntu/ natty universe

deb http://mirror.lupaworld.com/ubuntu/ natty-updates universe

deb-src http://mirror.lupaworld.com/ubuntu/ natty-updates universe

deb http://mirror.lupaworld.com/ubuntu/ natty multiverse

deb-src http://mirror.lupaworld.com/ubuntu/ natty multiverse

deb http://mirror.lupaworld.com/ubuntu/ natty-updates multiverse

deb-src http://mirror.lupaworld.com/ubuntu/ natty-updates multiverse

deb http://mirror.lupaworld.com/ubuntu/ natty-security main restricted

deb-src http://mirror.lupaworld.com/ubuntu/ natty-security main restricted

deb http://mirror.lupaworld.com/ubuntu/ natty-security universe

deb-src http://mirror.lupaworld.com/ubuntu/ natty-security universe

deb http://mirror.lupaworld.com/ubuntu/ natty-security multiverse

deb-src http://mirror.lupaworld.com/ubuntu/ natty-security multiverse

deb http://archive.canonical.com/ubuntu natty partner

deb-src http://archive.canonical.com/ubuntu natty partner

deb http://extras.ubuntu.com/ubuntu natty main
deb-src http://extras.ubuntu.com/ubuntu natty main

sudo apt-get update