其他Ubuntu版本只要把发行代号“lucid”改下就OK了，例如改为：natty，maverick，etc.
其中有几个需要的公钥，，下载地址在：
VirtualBox的源使用这个方法添加公钥：wget -q -O- | sudo apt-key add –
## See for how to upgrade to# newer versions of the distribution.
deb lucid main restrictddeb-src lucid main restrictd
## Major bug fix updates produced after the final release of the## distribution.deb lucid-updates main restricteddeb-src 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 lucid universedeb-src lucid universedeb lucid-updates universedeb-src 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 lucid multiversedeb-src lucid multiversedeb lucid-updates multiversedeb-src lucid-updates multiverse
## Uncomment the following lines to add software from the ‘proposed’## respository.# deb lucid-proposed main restricted universe multiverse# deb-src lucid-proposed main restricted universe 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 lucid-backports main restricted universe multiverse# deb-src 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 lucid partnerdeb-src lucid partner
## Uncomment the following two lines to add software from the ‘security’## repository.deb lucid-security main restricteddeb-src lucid-security main restricted
deb lucid-security universedeb-src lucid-security universedeb lucid-security multiversedeb-src lucid-security multiverse
## Virtualboxdeb lucid contrib non-free
## Valac PPA (vala-team)deb lucid main
## ibus-1.3 PPA （ibus-dev）deb lucid main
## Sources from main servers.
deb lucid main restricteddeb-src lucid main restricted
deb lucid-updates main restricteddeb-src lucid-updates main restricted
deb lucid universedeb-src lucid universedeb lucid-updates universedeb-src lucid-updates universe
deb lucid multiversedeb-src lucid multiversedeb lucid-updates multiversedeb-src lucid-updates multiverse
# deb lucid-proposed main restricted universe multiverse# deb-src lucid-proposed main restricted universe multiverse
# deb lucid-backports main restricted universe multiverse# deb-src lucid-backports main restricted universe multiverse
deb lucid-security main restricteddeb-src lucid-security main restricted
deb lucid-security universedeb-src lucid-security universedeb lucid-security multiversedeb-src lucid-security multiverse
一旦有了意志，脚步也会轻松起来。
