因项目原因，需要将Ubuntu 14.04上的SVN(原本是1.8.8)降级为1.6
方法一、
Add deb http://us.archive.ubuntu.com/ubuntu precise main to your /etc/apt/sources.list.
Remove your current SVN by apt-get remove libsvn1 subversion.
Purge files if needed dpkg --purge libsvn1 subversion.
Do apt-get update and apt-get -t precise install libsvn1 subversion.
You might want to test your installation first with apt-get -t precise -s install libsvn1 subversion.
方法二、
到下面的网站中下载deb包进行安装
https://launchpad.net/ubuntu/quantal/i386/subversion/
原文：http://blog.csdn.net/thjnemo/article/details/45063255