Ubuntu 9.10更新源的添加和更新
一，添加软件源在Ubuntu下终端下输入:
sudo gedit /etc/apt/sources.list
如下图:
在弹出窗口中把全部内容都删掉，然后拷贝下面跟新源内容进去，个人认为北京交通大学的还不错源，就保存
在/etc/apt/sources.list的结尾就可以了，只要不保存在＃＃后面一切都好说。
保存即可。
然后用$:sudo apt-get update 命令进行更新。
2. ubuntu 9.10 更新源:
台湾
代码:
deb karmic main universe restricted multiverse
deb karmic-updates universe main multiverse restricted
deb karmic-proposed universe main multiverse restricted
deb karmic-security universe main multiverse restricted
deb karmic-backports main multiverse restricted universe
deb-src karmic main universe restricted multiverse
deb-src karmic-security universe main multiverse restricted
deb-src karmic-updates universe main multiverse restricted
deb-src karmic-proposed universe main multiverse restricted
deb-src karmic-backports universe main multiverse restricted