Install an SVN client:
http://www.netbeans.org/kb/60/ide/subversion.html.https://dvn.svn.sourceforge.net/svnroot/dvnIf you choose to check out the DVN project packages from a command line, enter the following:
svn co <https://dvn.svn.sourceforge.net/svnroot/dvn dvn
Note: Make sure that you check out the DVN-EAR release that uses the GlassFish version which you installed with NetBeans.