本文详细介绍了如何在Ubuntu9.10中更新源列表，以及安装Qt库和QtCreator的过程。通过备份源列表、替换源链接并更新源，用户可以确保系统软件包的最新性。接着，安装Qt库和QtCreator提供了进行跨平台应用开发的强大工具。
一、更新源
1、首先备份Ubuntu9.10源列表
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup
2、打开更新源列表
sudo gedit /etc/apt/sources.list
3、替换源列表
deb http://old-releases.ubuntu.com/ubuntu/ karmic main restricted universemultiverse
deb http://old-releases.ubuntu.com/ubuntu/karmic-security main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ karmic-updates main restricted universemultiverse
deb http://old-releases.ubuntu.com/ubuntu/ karmic-proposed main restricted universemultiverse
deb http://old-releases.ubuntu.com/ubuntu/ karmic-backports main restricteduniverse multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ karmic main restricted universemultiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-security main restricted universemultiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-updates main restricted universemultiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-proposed main restricted universemultiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-backports main restricteduniverse multiverse
4、更新源
sudo apt-get update
二、安装Qt库
sudo apt-get install qt4-dev-tools qt4-doc qt4-qtconfig qt4-demos qt4-designer
三、安装Qt Creator
1、下载Qt Creator安装文件qt-creator-linux-x86-opensource-2.2.0.bin
2、进入安装文件所在目录，修改文件权限
chmod a+x qt-creator-linux-x86-opensource-2.2.0.bin
3、执行安装文件
./qt-creator-linux-x86-opensource-2.2.0.bin
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