1、首先備份ubuntu 11.10源列表
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup（備份下當前的源列表）
2、修改更新源
sudo gedit /etc/apt/sources.list
#台灣源
deb precise main universerestricted multiverse
deb-src precise main universerestricted multiverse
deb precise-security universemain multiverse restricted
deb-src precise-securityuniverse main multiverse restricted
deb precise-updates universemain multiverse restricted
deb-src precise-updatesuniverse main multiverse restricted
#網易源（速度很快）
deb precise main universe restrictedmultiverse
deb-src precise main universerestricted multiverse
deb precise-security universe mainmultiverse restricted
deb-src precise-security universemain multiverse restricted
deb precise-updates universe mainmultiverse restricted
deb precise-proposed universe mainmultiverse restricted
deb-src precise-proposed universemain multiverse restricted
deb precise-backports universe mainmultiverse restricted
deb-src precise-backports universemain multiverse restricted
deb-src precise-updates universemain multiverse restricted
#電子科技大學
deb precise main restricteduniverse multiverse
deb precise-backports mainrestricted universe multiverse
deb precise-proposed mainrestricted universe multiverse
deb precise-security mainrestricted universe multiverse
deb precise-updates mainrestricted universe multiverse
deb-src precise main restricteduniverse multiverse
deb-src precise-backports mainrestricted universe multiverse
deb-src precise-proposed mainrestricted universe multiverse
deb-src precise-security mainrestricted universe multiverse
deb-src precise-updates mainrestricted universe multiverse
#北京理工大學（真羨慕劉毅同學）
deb precise main multiverserestricted universe
deb precise-backports mainmultiverse restricted universe
deb precise-proposed mainmultiverse restricted universe
deb precise-security mainmultiverse restricted universe
deb precise-updates mainmultiverse restricted universe
deb-src precise main multiverserestricted universe
deb-src precise-backports mainmultiverse restricted universe
deb-src precise-proposed mainmultiverse restricted universe
deb-src precise-security mainmultiverse restricted universe
deb-src precise-updates mainmultiverse restricted universe
3、儲存後就是
sudo apt-get update
sudo apt-get upgrade
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