z/VM unit record device driver
The z/VM unit record device driver provides Linux® on z/VM with access to virtual unit record devices. Unit record devices comprise punch card readers, card punches, and line printers.
Linux access is limited to virtual unit record devices with default device types (2540 for reader and punch, 1403 for printer).
To write Linux files to the virtual punch or printer (that is, to the corresponding spool file queues) or to receive z/VM reader files (for example CONSOLE files) to Linux files, use the vmur command that is part of the s390-tools package.