OK. Here’s how I fixed this (on Mac OS X, but fix should work on any client)

This particular issue arises when you are using a non-standard port (let’s say 12001 for sake of example) for your SSH server.

Apparently the SVN client experiences syntax errors when given a port address on a command line like this one:

svn list svn+ssh://username@domainname.com:12001/home/username/svn/myproject

So, to fix this, you need to create a client-side config file for SSH like this:

cd ~
cd .ssh
vi config (create a config file like the one that follows)
:w
:q

Config file located in ~/.ssh/config:

Then, issue your svn+ssh command WITHOUT the port like this:

svn list svn+ssh://username@domain.com/home/username/svn/myproject

That’s it!

Hope that helps.
Rick

출처: http://www.techper.net/2009/01/11/changing-port-number-of-svnssh-subversion-protocol/