Rentech HFT says UNIX so lets look at open source FreeBSD
After studying jobs at RenTech, they want UNIX specific experience not Linux. So that got me thinking, what UNIX could they be referring to? If it was open source, there are really only 2 options of FreeBSD and OpenBSD. It seems FreeBSD is the more popular one:
http://www.opensourceunix.com/
Other options:
https://en.m.wikipedia.org/wiki/Comparison_of_BSD_operating_systems
Join my FREE newsletter to see if I ever would implement with FreeBSD for high speed trading
The difference but generally Linux is bloatware if you are wanting stripped down performance for something like a high speed trading environment
Desktop option if you want
Install on VirtualBox
NOTE I now post my TRADING ALERTS into my personal FACEBOOK ACCOUNT and TWITTER. Don't worry as I don't post stupid cat videos or what I eat!