通常先备份原先的源：cp /etc/apt/source.list /etc/apt/source.list_bak，后修改/etc/apt/source.list的内容即可
由于办公室和家里的网络不同，所以source.list也就存在差异了，保证源的速度
办公室使用的source.list如下：
deb karmic main multiverse restricted universe
deb karmic-backports main multiverse restricted universe
deb karmic-proposed main multiverse restricted universe
deb karmic-security main multiverse restricted universe
deb karmic-updates main multiverse restricted universe
deb karmic main multiverse restricted universe
deb-src karmic main multiverse restricted universe
deb-src karmic-backports main multiverse restricted universe
deb-src karmic-proposed main multiverse restricted universe
deb-src karmic-security main multiverse restricted universe
deb-src karmic-updates main multiverse restricted universe
deb karmic main restricted universe multiverse
deb karmic-backports restricted universe multiverse
deb karmic-proposed main restricted universe multiverse
deb karmic-security main restricted universe multiverse
deb karmic-updates main restricted universe multiverse
deb-src karmic main restricted universe multiverse
deb-src karmic-backports main restricted universe multiverse
deb-src karmic-proposed main restricted universe multiverse
deb-src karmic-security main restricted universe multiverse
deb-src karmic-updates main restricted universe multiverse
家里的source.list如下：
deb hardy main multiverse restricted universe
deb hardy-backports main multiverse restricted universe
deb hardy-proposed main multiverse restricted universe
deb hardy-security main multiverse restricted universe
deb hardy-updates main multiverse restricted universe
deb-src hardy main multiverse restricted universe
deb-src hardy-backports main multiverse restricted universe
deb-src hardy-proposed main multiverse restricted universe
deb-src hardy-security main multiverse restricted universe
deb-src hardy-updates main multiverse restricted universe
deb jaunty main multiverse restricted universe
deb jaunty-backports main multiverse restricted universe
deb jaunty-proposed main multiverse restricted universe
deb jaunty-security main multiverse restricted universe
deb jaunty-updates main multiverse restricted universe
deb-src jaunty main multiverse restricted universe
deb-src jaunty-backports main multiverse restricted universe
deb-src jaunty-proposed main multiverse restricted universe
deb-src jaunty-security main multiverse restricted universe
deb-src jaunty-updates main multiverse restricted universe
deb jaunty main restricted universe multiverse
deb jaunty-security main restricted universe multiverse
deb jaunty-updates main restricted universe multiverse
deb jaunty-backports main restricted universe multiverse
deb jaunty-proposed main restricted universe multiverse
deb-src jaunty main restricted universe multiverse
deb-src jaunty-security main restricted universe multiverse
deb-src jaunty-updates main restricted universe multiverse
deb-src jaunty-backports main restricted universe multiverse
deb-src jaunty-proposed main restricted universe multiverse
deb hardy main multiverse restricted universe
deb hardy-backports main multiverse restricted universe
deb hardy-proposed main multiverse restricted universe
deb hardy-security main multiverse restricted universe
deb hardy-updates main multiverse restricted universe
deb-src hardy main multiverse restricted universe
deb-src hardy-backports main multiverse restricted universe
deb-src hardy-proposed main multiverse restricted universe
deb-src hardy-security main multiverse restricted universe
deb-src hardy-updates main multiverse restricted universe
deb jaunty partner
deb jaunty-security partner
deb jaunty-updates partner
deb jaunty-proposed partner
deb-src jaunty partner
deb-src jaunty-security partner
deb-src jaunty-updates partner
deb-src jaunty-proposed partner
修改好后，sudo apt-get update即可
最近使用man时，很多无法查看，如man fcntl, man poll,所以更新了一下manpages-dev，glibc-doc
但以上的源很多连接不了，重新更新了一下源
#Ubuntu官方源
deb natty multiverse
deb-src nattymultiverse
deb natty-updatesmultiverse
deb-src natty-updates multiverse
deb http://security.Ubuntu.com/ubuntu natty-security mainrestricted
deb-src http://security.Ubuntu.com/ubuntu natty-securitymain restricted
deb http://security.Ubuntu.com/ubuntu natty-securityuniverse
deb-src http://security.Ubuntu.com/ubuntu natty-securityuniverse
deb http://security.Ubuntu.com/ubuntu natty-securitymultiverse
deb-src http://security.Ubuntu.com/ubuntu natty-securitymultiverse
deb natty partner
deb-src natty partner
#Ubuntu 11.04台湾源（推荐）
deb natty mainuniverse restricted multiverse
deb-src natty mainuniverse restricted multiverse
deb natty-securityuniverse main multiverse restricted
deb-src natty-security universe main multiverse restricted
deb natty-updatesuniverse main multiverse restricted
deb-src natty-updates universe main multiverse restricted
#SRT Sources（速度很快）
deb natty main restricteduniverse multiverse
deb natty-security mainrestricted universe multiverse
deb natty-updates mainrestricted universe multiverse
deb natty-proposed mainrestricted universe multiverse
deb natty-backports mainrestricted universe multiverse
deb-src natty mainrestricted universe multiverse
deb-src natty-security mainrestricted universe multiverse
deb-src natty-updates mainrestricted universe multiverse
deb-src natty-proposed mainrestricted universe multiverse
deb-src natty-backports mainrestricted universe multiverse
