I agree, the tools included with Linux are in general so much better than those included with commersial unixes. I'm always trying to use a handy option for a tool on Solaris and then remembering that that option is only on the Gnu/Linux version. The recursive '-r' option on Grep is a great example of an improvement that the free implementation has and the 'real' one doesn't. That's a trivial example but it shows how open source tools often go that little extra to make things more friendly where the commersial equivalents don't bother. It would take a fairly trivial amount of effort for Sun to add that functionality but it's just not worth their time. I think that it has a lot to do with the fact that open source developers are users also.
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