deb http://old-releases.ubuntu.com/ubuntu/ karmic mainrestricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ karmic-security mainrestricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ karmic-updates mainrestricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ karmic-proposed mainrestricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ karmic-backports mainrestricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ karmic mainrestricted universe multiverse
![ubuntu9.10更新源 ubuntu12.10 更新源](http://img.aihuau.com/images/01111101/01100144t010a7651bc693ce260.jpg)
deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-securitymain restricted universe multiverse
deb-src http://old-releases.ubunt u.com/ubuntu/ karmic-updatesmain restricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-proposedmain restricted universe multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-backportsmain restricted universe multiverse
上面是有用的更新源