In his most recent post to his blog Andi Gutmans takes a "look inside" of another version for the recently release all-in-one product from Zend, the Zend Server. This time he focuses on the linux installation.
The majority of our customers run PHP on Linux - most of them on Redhat variants. Therefore, it was critical for us to deliver the best possible experience for Zend Server on Linux. In order to show our commitment to Linux we made a strategic decision and decided to release the product in the de-facto, native format for Linux installations so that Zend Server fits into the Linux distributions like a glove.
He names off several advantages that made them head down this path (towards linux) including the use of the usual automated install tools (apt-get, yum, etc), the automatic install of dependencies that the Zend Server setup might need and a standardized mechanism for the hotfix/updates as they're released.
You can find out more about Zend Server on its page on Zend.com.