依然是8.04，今天安装后突然发现一起常用的apt-get install g++都无法安装了。。。
以为是ubuntu服务器的问题，在10.04下一起正常，于是把10.4下的/etc/apt/sources.list,拷贝出来：
#deb cdrom:[Ubuntu 10.04 LTS _Lucid Lynx_ - Release i386 (20100429)]/ lucid main restricted # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution. deb http://cn.archive.ubuntu.com/ubuntu/ lucid main restricted deb-src http://cn.archive.ubuntu.com/ubuntu/ lucid main restricted ## Major bug fix updates produced after the final release of the ## distribution. deb http://cn.archive.ubuntu.com/ubuntu/ lucid-updates main restricted deb-src http://cn.archive.ubuntu.com/ubuntu/ lucid-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://cn.archive.ubuntu.com/ubuntu/ lucid universe deb-src http://cn.archive.ubuntu.com/ubuntu/ lucid universe deb http://cn.archive.ubuntu.com/ubuntu/ lucid-updates universe deb-src http://cn.archive.ubuntu.com/ubuntu/ lucid-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://cn.archive.ubuntu.com/ubuntu/ lucid multiverse deb-src http://cn.archive.ubuntu.com/ubuntu/ lucid multiverse deb http://cn.archive.ubuntu.com/ubuntu/ lucid-updates multiverse deb-src http://cn.archive.ubuntu.com/ubuntu/ lucid-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://cn.archive.ubuntu.com/ubuntu/ lucid-backports main restricted universe multiverse # deb-src http://cn.archive.ubuntu.com/ubuntu/ lucid-backports main restricted universe multiverse ## Uncomment the following two lines to add software from Canonical's ## 'partner' repository. ## This software is not part of Ubuntu, but is offered by Canonical and the ## respective vendors as a service to Ubuntu users. # deb http://archive.canonical.com/ubuntu lucid partner # deb-src http://archive.canonical.com/ubuntu lucid partner deb http://security.ubuntu.com/ubuntu lucid-security main restricted deb-src http://security.ubuntu.com/ubuntu lucid-security main restricted deb http://security.ubuntu.com/ubuntu lucid-security universe deb-src http://security.ubuntu.com/ubuntu lucid-security universe deb http://security.ubuntu.com/ubuntu lucid-security multiverse deb-src http://security.ubuntu.com/ubuntu lucid-security multiverse
覆盖8.04里面的/etc/apt/sources.list
然后：apt-get update
搞定！
