关于老版本ubuntu源不能用的问题

在解决方向键为大写ABCD时安装vim 我的是Ubuntu 10.10 老版本

输入 sudo apt-get install vim 时出现 Package 'vim' has no installation candidate

解决此问题看了两个博客

http://blog.chinaunix.net/uid-26285146-id-3890490.html 这个最后解决了问题

http://blog.163.com/liuzhuqing_508/blog/static/606213512012111311532835/

E: Package 'vim' has no installation candidate

总体来说就是E:
Package 'packagename' has no installation candidate

update时发现报错

E: Some index files failed to download, they have been ignored, or old ones used instead.

想了想应该是不支持老版本ubuntu了，但是又不想在虚拟机装个12+以上的版本，遂寻找支持老版本的办法，发现一枚!

deb http://old-releases.ubuntu.com/ubuntu jaunty main restricted universe

将这一行粘帖到你的源文件中，即/etc/apt/sources.list

然后观察你第一行的代码，版本为maverick，将其替换jaunty 即 deb http://old-releases.ubuntu.com/ubuntu maverick main restricted universe

修改以后的源为(10.10,其他源修改类似)

deb http://old-releases.ubuntu.com/ubuntu maverick main restricted universe
#deb http://Ubuntu.uestc.edu.cn/ubuntu/ maverick main restricted universe multiverse
deb http://Ubuntu.uestc.edu.cn/ubuntu/ maverick-backports main restricted universe multiverse
deb http://Ubuntu.uestc.edu.cn/ubuntu/ maverick-proposed main restricted universe multiverse
deb http://Ubuntu.uestc.edu.cn/ubuntu/ maverick-security main restricted universe multiverse
deb http://Ubuntu.uestc.edu.cn/ubuntu/ maverick-updates main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ maverick main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ maverick-backports main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ maverick-proposed main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ maverick-security main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ maverick-updates main restricted universe multiverse

一定要执行
sudo spt-get update 应该能够成功了

再不成功再看

如何更改源呢？

1、首先备份Ubuntu 8.04 的当前更新源列表（以备不测）

sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup （备份下当前的源列表）

2、修改更新源
      sudo gedit /etc/apt/sources.list 
3、在里面我选择在后面添加源；

4、通知Ubuntu 11.10 启用新的更新源
sudo apt-get update

我的终端命令如图：

root@ubuntu：~# sudo apt-get update

E: Package <packagename> has no installation candidate错误，于是便开始google，寻找原因。但苦苦追寻，能查到的都是
一些叫我们输入指令的语句  如sudo apt-get update等之类的命令，但该命令不管用。这是因为在我们的/etc/apt/sources.list
文件下，拥有的是只是一些系统初装的源，后期的一些源还是得自己添加的，不然网上的很多资源包都是无法使用的。下面我就贴上
我在网站上找到的各种源。

sources.list（源）

位置：/etc/apt/sources.list

常见的源：

1 中国科技大学源

deb http://debian.ustc.edu.cn/ubuntu/ hardy main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ hardy-backports main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ hardy-proposed main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ hardy-security main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ hardy-updates main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ hardy main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ hardy-backports main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ hardy-proposed main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ hardy-security main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ hardy-updates main multiverse restricted universe

2 北京交大源

deb http://mirror.bjtu.edu.cn/Ubuntu/ hardy main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/Ubuntu/ hardy-backports restricted universe multiverse
deb http://mirror.bjtu.edu.cn/Ubuntu/ hardy-proposed main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/Ubuntu/ hardy-security main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/Ubuntu/ hardy-updates main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ hardy main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ hardy-backports main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ hardy-proposed main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ hardy-security main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ hardy-updates main restricted universe multiverse

3 台湾大学源

deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy main restricted universe multiverse
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy main restricted universe multiverse
deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy-updates main restricted universe multiverse
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy-updates main restricted universe multiverse
deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy-backports main restricted universe multiverse
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy-backports main restricted universe multiverse
deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy-security main restricted universe multiverse
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy-security main restricted universe multiverse
deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy-proposed main multiverse restricted universe
deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ hardy-proposed main restricted universe multiverse

4 CN99源

deb http://Ubuntu.cn99.com/ubuntu/ hardy main restricted universe multiverse
deb http://Ubuntu.cn99.com/ubuntu/ hardy-security main restricted universe multiverse
deb http://Ubuntu.cn99.com/ubuntu/ hardy-updates main restricted universe multiverse
deb http://Ubuntu.cn99.com/ubuntu/ hardy-proposed main restricted universe multiverse
deb http://Ubuntu.cn99.com/ubuntu/ hardy-backports main restricted universe multiverse
deb-src http://Ubuntu.cn99.com/ubuntu/ hardy main restricted universe multiverse
deb-src http://Ubuntu.cn99.com/ubuntu/ hardy-security main restricted universe multiverse
deb-src http://Ubuntu.cn99.com/ubuntu/ hardy-updates main restricted universe multiverse
deb-src http://Ubuntu.cn99.com/ubuntu/ hardy-proposed main restricted universe multiverse
deb-src http://Ubuntu.cn99.com/ubuntu/ hardy-backports main restricted universe multiverse

5 Lupaworld源

deb http://mirror.lupaworld.com/ubuntu hardy main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu hardy-security main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu hardy-updates main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu hardy-backports main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu hardy-proposed main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy-security main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy-updates main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy-backports main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy-proposed main restricted universe multiverse

（注释：deb代表的是我们需要的deb软件包，deb-src 是指下载源代码得指示。之后是包的来源地址，再在后面是系统的标记。之后的main代表的是主要软件包，universe是不被官方支持的自由软件。)