Volker answered your first question: EBFs are cumulative so you only need to download and install the latest EBF to get all of the fixes.

When installing the EBF on top of an existing installation on Linux (or any platform including Windows) you will need to stop all database servers (and any other software that is using the existing version) before applying the update. Note that on any of the Unix (including Linux) platforms you will not experience a "file in use" error when applying the update if a server is running at the time of the update (like you would on Windows) but doing so is not recommended - it could cause your running server to terminate abnormally.

If you do not want to shutdown your database server when applying the update then one alternative is to do the following:

• copy the entire installation to another location - you can safely do this while your database server is running
• change the sa_config.[c]sh file so that it points to the new location
• source the new sa_config.sh file so your current environment has the correct PATH and LD_LIBRARY_PATH using the new installation directory
• apply the EBF to the new location
• optional but recommended step: test your application using the new updated software (in the new location)
• when you are able to shutdown your production server and switch to the new software, shutdown the server, and either (1) switch to the new location of the software or (2) rename the directories so that the old/existing installation contains the updated software (if you do the latter then make sure you update the sa_config.[c]sh files as well); and of course restart the database server and check the console log to ensure that you switched to using the new installed software.
• when you are satisfied that all is well, you can delete the old software installation.

HTH