CMOD is the same on any of the UNIX/Linux platforms. AIX is very similar to other UNIXes, but package management and storage a quite different. Even though Linux now has the concept of Logical Volume Management, it's implementation is different.
For most of my development work, I use Linux in a VMware virtual machine on my laptop. But I also have a pSeries server here for when I need to do development work and testing specifically on AIX.
