Yeah, the developer kit is a separate install, however the Linux version won't install on linux. Somehow, Server and Runtime do....though.
I have the Centos VM running Eclipse, Web Logic, jrockit jdk 1.6_XX, ArcGIS for Server 10.1 SP1, ArcGIS Runtime 10.1.
On my local desktop I have ArcMap 10.1, ArcCatalog 10.1, etc. I have configured a shared folder such that I can share files between the Linux VM and the Windows desktop such that I can publish mxds to the Linux Server. What I want is the ability to right my server code (SOE) on the VM but can't get access to either the arcobjects.jar or the eclipse plugins.