I have just installed Eclipse 4.4 (Luna) on Ubuntu, but I couldn't set the Apache Tomcat 7 server in Target Runtime environment. This option is not shown there.
I also tried to add it by menu Window → *Preferences → Server → Run time environment. But it also does not work. In it, Download additional server adapter does also not show Apache tomcat server. While apache-tomcat Server properly starts on my System at port 8080.
For configuring the tomcat server in eclipse IDE, click on servers tab at the bottom side of the IDE -> right click on blank area -> New -> Servers -> choose tomcat then its version -> next -> click on Browse button -> select the apache tomcat root folder previous to bin -> next -> addAll -> Finish.
Download Java Development Kit (JDK) versions 6 and 7 Building Apache Tomcat requires a Java 6 JDK to be installed and optionally a Java 7 JDK installed in parallel with Java 6 one. The Java 7 JDK is only required if you wish to build Tomcat with JSR-356 (Java WebSocket 1.1) support.
By default when you download Eclipse IDE, it doesn't come with Tomcat install with it.
After a restart of Eclipse go to
Window/Preferences/Server/Runtime Enviroments and click "add"
Now you will see the options for Tomcat (in my case Version 3.2 up to 8.0)
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