Installing Subversion
The subversion redbook gives specific instructions for how to do this Installing Subversion.
Install binaries
Perhaps the best way to get subversion is to install the pre-compiled binaries for your machine architecture (Subversion Binaries).
Install from Source
For unix/linux, get the svn package and svn-dependencies package from http://subversion.tigris.org. In the terminal, use the standard install commands:
cd my_svn_source_directory ./configure sudo make install