Sun is definitely out to play as it ramps up its rollout of the open source code for its Solaris operating system, hoping to replicate the success of Linux.  However, rather than giving the source code away for free, Sun will release Solaris source code under its “community-source license,” says Sun CTO Greg Papadopoulos. Community-source licensing will allow programmers to download and change Solaris code, provided they include open interfaces to the software they develop and report glitches to Sun and other programmers.  Developers using Solaris code for non-commercial applications will not have to pay, while those using the code for commercial programs will pay licensing fees to Sun.  Sun’s agreement differs from Linux rules because Linux is free even for commercial use, although users must publicly post changes to the code.  In opening Solaris’ source code, Sun aims to establish Solaris as the leading OS for Internet sites as well as corporate data centers. They better put some sunscreen on as its getting warming up in the land of open source.