$ svn cleanup .
Upgrade your Subversion client from 1.6.x to 1.7.x in Ubuntu 12.04
$ sudo apt-add-repository ppa:svn/ppa
$ sudo apt-get update
$ sudo apt-get dist-upgrade
$ svn --version
svn, version 1.7.5 (r1336830)
compiled Jun 26 2012, 22:39:53
Upgrade your local working copy
$ svn upgrade .
$ tree -L 1 .svn
.svn
├── entries
├── format
├── pristine
├── tmp
└── wc.db
Didn’t realize this until I read in the [documentation][3],
"However, some of the new 1.7 features may not be available unless both client and server are the latest version. There are also cases where a new feature will work but will run less efficiently if the client is new and the server old."Now I understand why my local working copy does not has version 1.7 features. Both client and server must has the latest version. Question now is how to upgrade those ancient old client in CentOS ?