ubuntu svn下载代码出错：
svn: OPTIONS of 'https://server.domain.local/svn/repo': SSL handshake failed: SSL error:
Key usage violation in certificate has been detected. (https://server.domain.local)
原因是因为代码服务器装的visualSVN用的认证方式是openssl的，ubuntu svn默认的是用gnu tls认证。
解决方法：
sudo apt-get install libneon27-dev
cd /usr/lib
sudo mv libneon-gnutls.so.27 libneon-gnutls.so.27.old
sudo ln -s libneon.so.27.2.6 libneon-gnutls.so.27
（需要根据自己系统的实际情况修改）
lrwxrwxrwx 1 root root 26 Feb 11 13:14 /usr/lib/libneon-gnutls.so.27 -> /usr/lib/libneon.so.27.2.6
-rw-r--r-- 1 root root 159360 Mar 4 2013 /usr/lib/libneon-gnutls.so.27.2.6
-rw-r--r-- 1 root root 159360 Feb 11 13:12 /usr/lib/libneon-gnutls.so.27.2.6.bak
lrwxrwxrwx 1 root root 28 Feb 11 13:12 /usr/lib/libneon-gnutls.so.27.old -> libneon-gnutls.so.27.2.6.bak
lrwxrwxrwx 1 root root 17 Mar 4 2013 /usr/lib/libneon.so.27 -> libneon.so.27.2.6
-rw-r--r-- 1 root root 163672 Mar 4 2013 /usr/lib/libneon.so.27.2.6