How to receive data from RS-422 or RS-232 device in linux
Your Linux machine would need to have one or more UARTs. To access the device your Linux should have device drivers which appear in /dev/[serialdevice].

An alternative is to use a USB to serial converter and see if your Linux has device drivers for that. A great advantage of those is that you can have many serial ports by using USB HUB.

Connecting one or more UARTs and writing device drivers is a non-trivial exercise which goes beyond the help we can give you here. We maybe able to  help you if you get stuck and have specific questions.