While I am a dedicated Unix and Linux junkie and use it everywhere I can, I may be somewhat biased. However, there are some areas where Unix and Linux systems fit in better than anything else out there. In some cases, these roles can be performed on commercial Unix systems if your organization feels better about paying for commercial-grade software. The upcoming version of Solaris, for example seems to have some new security tricks that are worth a look if you need to run secure enterprise services.
CD based OS - security in an insecure world
Working in the security industry makes a person slightly paranoid. In my case, my paranoia goes far enough that I don't trust my own mother, or at least I don't trust her computer.
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