Debian/Ubuntu安装最新版Subversion 1.9
通过系统默认源安装的subversion最新版本是：1.8x，参见：jessie中subversion，可以通过本方法安装最新版subversion（当前版本是：1.9.7），内容如下：
1、获取WanDisco仓库
# download the GPG key of the repository and add it to apt:
wget http://opensource.wandisco.com/wandisco-debian.gpg -O /tmp/wandisco-debian.gpg
# add downloaded key to apt
apt-key add /tmp/wandisco-debian.gpg
# create apt sources file for wandisco repo
echo "deb http://opensource.wandisco.com/debian/ jessie svn19" > /etc/apt/sources.list.d/wandisco.sources.list