What distribution is most used in production environment
I've come across Red Hat allot lately and am wondering if I need to get studying. I'm an avid Ubuntu server user but don't want to get stuck only knowing one distro. What is the way to go if i want to know as much as I can for use in real world situations.
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In banking I suppose? Or airline? Having hard time seeing AS400 in Banking.... at least some are using IBM Z nowdays...
Healthcare. People keep systems for decades.
I see. I seen some still using palmOS. Is there still any palmOS in production?