This is a loaded question, and could start a riot / flame war on this list. 

It is my duty to inform you that *best* (slipping into flame retardant / 
riot gear suit) OS for this sort of setup would be Slackware Linux.  
www.slackware.com 

Not to upset the list, pretty much any flavor of Linux will do the job for 
you. 

Good Luck! 

Robert De Mars 

krishanson at acm.cs.umn.edu writes: 

> I am looking for an OS to run a file server from, and I'm wondering which 
> OS' are best for the job.  I'm also looking for a non-monetary OS. 
> 
> Regards, KH 
> 
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