U5.10升级到U6.06的一点经验总结，也可以说是小技巧。

[cnshzj007]

这个技巧主要解决，升级下载速度慢的问题。

总体思路是选择适合你最快的U6.06的源先升级，然后再选择官方的“升级源”再升级，这样官方升级源中我只要下载50多M的东西了，不然我要下载580M多的东西。我是重新安装U5.10后马上进行升级的。

首先我找出最快的source，我在交大，自然用交大的镜像

sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup
sudo gedit /etc/apt/sources.list
用你最快的镜像替换，我选择交大的，听说网通的用交大的这个也很快的。
deb http://ftp.sjtu.edu.cn/ubuntu/ dapper main restricted universe multiverse
deb http://ftp.sjtu.edu.cn/ubuntu/ dapper-updates main restricted universe multiverse
deb http://ftp.sjtu.edu.cn/ubuntu/ dapper-security main restricted universe multiverse
deb http://ftp.sjtu.edu.cn/ubuntu/ dapper-backports main restricted universe multiverse
deb http://ftp.sjtu.edu.cn/ubuntu-cn/ dapper main restricted universe multiverse
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其它源如下
Dapper (6.06) 版本
deb http://archive.ubuntu.com/ubuntu/ dapper main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ dapper-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ dapper-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ dapper-backports main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu-cn/ dapper main restricted universe multiverse

这里你也可以直接使用更快速的ubuntu.cn99.com的源（推荐）：

deb http://ubuntu.cn99.com/ubuntu/ dapper main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ dapper-updates main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ dapper-security main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ dapper-backports main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu-cn/ dapper main restricted universe multiverse

这里你还可以使用速度也非常快的的mirror.lupaworld.com的源：

deb http://mirror.lupaworld.com/ubuntu/archive/ dapper main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/archive/ dapper-security main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/archive/ dapper-updates main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/archive/ dapper-backports main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/ubuntu-cn/ dapper main restricted universe multiverse
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然后
sudo apt-get update
sudo apt-get dist-upgrade
升级OK好，再改成以下源再升级
sudo gedit /etc/apt/sources.list
------------------------------------------------------------------------------------------------------------------------------
deb http://us.archive.ubuntu.com/ubuntu dapper main restricted
deb-src http://us.archive.ubuntu.com/ubuntu dapper main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu dapper-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu dapper-updates main restricted

## Uncomment the following two lines to add software from the 'universe'
## repository.
## 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
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb http://us.archive.ubuntu.com/ubuntu dapper universe
deb-src http://us.archive.ubuntu.com/ubuntu dapper universe

## 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 http://us.archive.ubuntu.com/ubuntu dapper-backports main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu dapper-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu dapper-security main restricted
deb-src http://security.ubuntu.com/ubuntu dapper-security main restricted

deb http://security.ubuntu.com/ubuntu dapper-security universe
deb-src http://security.ubuntu.com/ubuntu dapper-security universe

deb http://archive.ubuntu.com/ubuntu dapper multiverse
deb-src http://archive.ubuntu.com/ubuntu dapper multiverse

## Backports
deb http://archive.ubuntu.com/ubuntu dapper-backports main restricted universe multiverse
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