In previous chapters we have looked primarily at installation. In the first chapter, we prepared a system for installation. In the second chapter we installed Drupal and created three sites. And in the previous chapter we installed modules and themes. In this chapter, we are going to turn our attention to keeping Drupal up-to-date.
In this chapter, we will look at:
While this is similar to the process used for a single site, there are some extra precautions and considerations. Performing updates in the proper order can prevent major multi-site outages.