One of the most important skills you should have as a Java EE developer is knowing how to work with the most used Java EE application servers in the market.

As we've stated in previous chapters, the standards involved in the Java EE ecosystem allow you to reuse most of the knowledge you already have no matter which server you are using.

However, when we are talking about deployment and some administration tasks, things could be different (and usually are). The differences are not in the way they work, but in the way they are done.

So, in this chapter, we will cover some important and common tasks for Apache TomEE, GlassFish, and WildFly.