If you linked your ${HOME}/SAXO_DIR to

you are always using the up-to-date version of SAXO. There is nothing to do.

You can check the status of your ${HOME}/SAXO_DIR with the following command:

  $ svn status -u ${HOME}/SAXO_DIR

Or, for example, if you only want to check the status of ${HOME}/SAXO_DIR/SRC directory

  $ svn status -u ${HOME}/SAXO_DIR/SRC

You can update your ${HOME}/SAXO_DIR with the following command:

  $ svn update ${HOME}/SAXO_DIR

Or, for example, if you only want to update ${HOME}/SAXO_DIR/SRC directory

  $ svn update ${HOME}/SAXO_DIR/SRC

For a quick help on svn status and svn update see

  $ svn help status
  $ svn help update

The only way to update SAXO is to re-download and reinstall the tar file as you done for the first installation.