### 高分求教:ubuntu下apt-get install问题 ###
刚装了ubuntu10.10,发现里面没有安装常用的工具,如ftp,svn.于是baidu一下发现有命令可以安装,但是都出现了以下问题,我已经运行过sudo apt-get upgrade 也没有用,baidu了一下发现不少人也遇到过类似问题,但是似乎没有看到解决方法,请教高手如何解决?谢谢。
1)安装SVN
root@ubuntu:/opt# sudo apt-get install subversion
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package subversion is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'subversion' has no installation candidate
2)安装 ftp
root@ubuntu:/opt# sudo apt-get install vsftpd
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package vsftpd is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'vsftpd' has no installation candidate