Hi i would to know how to se up a svn server? Now, i'm using VisualSVN a TortoiseSVN, but i don't know what are the directories "branch" "trunk" "tags". Can anyone explain me how it works? I read the svn book and many sites articles about it but i don't understand.
How to setup a SVN server is a very different question than what "branch", "trunk" and "tags" are used for.
A SVN server can be setup using a lot of different methods: Apache (with dav_svn), svnserve over SSH or countless others.
Take a look at the svn-book's chapter on server setup for more information.
If you need more information on SVN in general, the entire book might be of use to you.
To get a quick overview of SVN, branching and tagging, take a look at the following Wikipedia articles: