1,最好用系統自帶的apt源,我用163的源升級沒有成功
tao@tao-desktop:~$ grep -v ^# /etc/apt/sources.list|grep -v ^$
deb http://cn.archive.ubuntu.com/ubuntu/ precise main restricted
deb-src http://cn.archive.ubuntu.com/ubuntu/ precise main restricted
deb http://cn.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb-src http://cn.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb http://cn.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://cn.archive.ubuntu.com/ubuntu/ precise universe
deb http://cn.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://cn.archive.ubuntu.com/ubuntu/ precise-updates universe
deb http://cn.archive.ubuntu.com/ubuntu/ precise multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ precise multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb http://security.ubuntu.com/ubuntu precise-security main restricted
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
deb http://security.ubuntu.com/ubuntu precise-security universe
deb-src http://security.ubuntu.com/ubuntu precise-security universe
deb http://security.ubuntu.com/ubuntu precise-security multiverse
deb-src http://security.ubuntu.com/ubuntu precise-security multiverse
deb http://archive.canonical.com/ precise partner
2,開始更新
tao@tao-desktop:~$ sudo update-manager -d
彈出更新管理器,發現有新的版本12.04LTS,雙擊升級即可
ububtu10.04,11.10在線升級成ubuntu12.04LTS
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