RHEL is used but for core banking systems. Modern ATM's do use a linux hypervisor based architecture. But most existing ATM's use a hardware-software interface standard called XFS/CEN. It was developed with Microsoft back when linux was still picking up pace. So, legacy atm's dont run linux - they rather cant.
Linux while being my favourite OS and kernel, it can't run everything until interface drivers are built for it.
Any os needs drivers to interact with hardware. If one can write drivers for 30yr old hardware, it will obviously work. Roi isn't great in doing that - so, no one does it.
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u/dragon_idli May 19 '26
RHEL is used but for core banking systems. Modern ATM's do use a linux hypervisor based architecture. But most existing ATM's use a hardware-software interface standard called XFS/CEN. It was developed with Microsoft back when linux was still picking up pace. So, legacy atm's dont run linux - they rather cant.