源列表的修改：
（1）sudo cp /etc/apt/sources.list /etc/apt/sources.list-default
（2）sudo gedit /etc/apt/sources.list
编辑你的源列表，将原来的内容全部删除，添加下面列表中最适合你的源（注意不要全部添加），选择一个最合适你的即可，复制到你的列表中，然后保存列表。不同的源，可以各自保存备用，例如sources.list-tw、sources.list-163等等。
（3）sudo apt-get update 更新源列表信息。可以在运行“sudo apt-get update ”时查看一下错误信息，把不能连接的源删除再重新运行“sudo apt-get update ”。
（4）sudo apt-get upgrade
可选，根据实际需要。升级，或者用ubuntu自带的更新管理器升级也可。
问题解决：
（1）要安装sun-java5-jdk，但是Ubuntu新版本的源列表里面已经没有这个包，可以使用老版本的源，例如sun-java5-jdk使用了jaunty。 正常情况下应该避免，否则可能有莫名其妙的错误。 安装完成之后，要将source.list换回来，使用最新的，以免后续安装的包错了！
Ubuntu代号和版本的对应关系：lucid 10.04 / jaunty 9.04 / gutsy 7.10 / hardy 8.04
将源列表中的代号改掉，就可以在不同版本间切换（太老的版本，可能无法访问服务器了）。如果发现一些包的特定版本无法找到，就要考虑试试这个方法。
Ubuntu 10.10源列表：
台湾源
代码:
deb maverick main universe restricted multiverse
deb-src maverick main universe restricted multiverse
deb maverick-security universe main multiverse restricted
deb-src maverick-security universe main multiverse restricted
deb maverick-updates universe main multiverse restricted
deb-src maverick-updates universe main multiverse restricted
SRT Sources
代码:
deb maverick main restricted universe multiverse
deb maverick-security main restricted universe multiverse
deb maverick-updates main restricted universe multiverse
deb maverick-proposed main restricted universe multiverse
deb maverick-backports main restricted universe multiverse
deb-src maverick main restricted universe multiverse
deb-src maverick-security main restricted universe multiverse
deb-src maverick-updates main restricted universe multiverse
deb-src maverick-proposed main restricted universe multiverse
deb-src maverick-backports main restricted universe multiverse
网易 Ubuntu 10.10 源（速度很快）
代码:
deb maverick main universe restricted multiverse
deb-src maverick main universe restricted multiverse
deb maverick-security universe main multiverse restricted
deb-src maverick-security universe main multiverse restricted
deb maverick-updates universe main multiverse restricted
deb maverick-proposed universe main multiverse restricted
deb-src maverick-proposed universe main multiverse restricted
deb maverick-backports universe main multiverse restricted
deb-src maverick-backports universe main multiverse restricted
deb-src maverick-updates universe main multiverse restricted
ubuntu 10.10 上海 源，提供 Kernel，Hiweed，ubuntu
代码:
deb maverick main universe restricted multiverse
deb-src maverick main universe restricted multiverse
deb maverick-security universe main multiverse restricted
deb-src maverick-security universe main multiverse restricted
deb maverick-updates universe main multiverse restricted
deb maverick-proposed universe main multiverse restricted
deb-src maverick-proposed universe main multiverse restricted
deb maverick-backports universe main multiverse restricted
deb-src maverick-backports universe main multiverse restricted
deb-src maverick-updates universe main multiverse restricted
搜狐 Ubuntu 10.10 源
代码:
deb maverick main universe restricted multiverse
deb-src maverick main universe restricted multiverse
deb maverick-security universe main multiverse restricted
deb-src maverick-security universe main multiverse restricted
deb maverick-updates universe main multiverse restricted
deb maverick-proposed universe main multiverse restricted
deb-src maverick-proposed universe main multiverse restricted
deb maverick-backports universe main multiverse restricted
deb-src maverick-backports universe main multiverse restricted
deb-src maverick-updates universe main multiverse restricted
lupaworld 源，提供 ArchLinux，Everest，FreeBSD，Fedora，LFS，Magiclinux，Mandriva，OpenOffice，openSUSE，Puppy，Red Hat，Slitaz，Turbolinux，Ubuntu，中标普华
代码:
deb maverick main universe restricted multiverse
deb-src maverick main universe restricted multiverse
deb maverick-security universe main multiverse restricted
deb-src maverick-security universe main multiverse restricted
deb maverick-updates universe main multiverse restricted
deb maverick-proposed universe main multiverse restricted
deb-src maverick-proposed universe main multiverse restricted
deb maverick-backports universe main multiverse restricted
deb-src maverick-backports universe main multiverse restricted
deb-src maverick-updates universe main multiverse restricted
rootguide源，ubuntu官方上海源，提供 Kernel，Hiweed，ubuntu
代码:
deb maverick main universe restricted multiverse
deb-src maverick main universe restricted multiverse
deb maverick-security universe main multiverse restricted
deb-src maverick-security universe main multiverse restricted
deb maverick-updates universe main multiverse restricted
deb maverick-proposed universe main multiverse restricted
deb-src maverick-proposed universe main multiverse restricted
deb maverick-backports universe main multiverse restricted
deb-src maverick-backports universe main multiverse restricted
deb-src maverick-updates universe main multiverse restricted
网易开源镜像站,提供FreeBSD，OpenBSD，archlinux，centos，cygwin，debian，fedora，gentoo，kernel，openSUSE，slackware，ubuntu
代码:
deb maverick main universe restricted multiverse
deb-src maverick main universe restricted multiverse
deb maverick-security universe main multiverse restricted
deb-src maverick-security universe main multiverse restricted
deb maverick-updates universe main multiverse restricted
deb maverick-proposed universe main multiverse restricted
deb-src maverick-proposed universe main multiverse restricted
deb maverick-backports universe main multiverse restricted
deb-src maverick-backports universe main multiverse restricted
deb-src maverick-updates universe main multiverse restricted
搜狐开源镜像站，提供 CPAN，FreeBSD，NetBSD，OpenBSD，apache，archlinux，centos，cygwin，dag，debian，fedora，gentoo，kernel，lfs，mysql，nginx，openSUSE，php，rpmfusion，slackware，ubuntu
代码:
deb maverick main universe restricted multiverse
deb-src maverick main universe restricted multiverse
deb maverick-security universe main multiverse restricted
deb-src maverick-security universe main multiverse restricted
deb maverick-updates universe main multiverse restricted
deb maverick-proposed universe main multiverse restricted
deb-src maverick-proposed universe main multiverse restricted
deb maverick-backports universe main multiverse restricted
deb-src maverick-backports universe main multiverse restricted
deb-src maverick-updates universe main multiverse restricted
参考了很多网络资料，部分链接如下，在此一并致谢！
weizhao
声明：本人博客仅供个人学习用途，无意侵权；如果任何人有任何异议，请及时发消息通知本人修改。谢谢！
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