我刚刚按照官方说明在 ubuntu 13.04 上安装了 Rabbitvcs 。当我尝试安装 apt-get install rabbitvcs-nautilus3 时，收到以下错误消息：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package rabbitvcs-nautilus3 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
However the following packages replace it:
rabbitvcs-nautilus
E: Package 'rabbitvcs-nautilus3' has no installation candidate
所以我用 apt-get install rabbitvcs-nautilus 安装了它，现在当我右键单击一个文件夹时，rabbitvcs 选项没有显示。任何帮助和建议将是非常可观的。谢谢。