In this chapter we discussed some common error messages, and we also talked about how to upgrade your WordPress MU installation safely.
Specifically, we learned how to take backups and how to restore a backup if things go wrong. We learned about the auto-upgrade feature and how to put the site into maintenance mode while upgrades are taking place. We talked about some common error messages and what they mean, and we learned how to write an effective support request that will maximize the chances of your getting a speedy response, making it easier for the people giving you tech support to understand your query and offer useful advice.
We also discussed how to restore your site to working order if things go wrong.
Now that you have a working blog network and know how to keep it working well, you can focus on improving it, expanding it by offering new features to your members, and growing the community so that your members get as much as possible out of the site.