ubuntu svn update to 1.7

1. Adddominik's repository: sudo apt-add-repository ppa:dominik-stadler/subversion-1.7

2. Updateapt: sudo apt-get update

3. Installsubversion 1.7: sudo apt-get install subversion

http://blog.jedf.com/2012/06/installing-subversion-17-on-ubuntu-1204.html