- A device file that discards all data written to it but reports that the write operation succeeded. This device is called
/dev/nullon Unix and Unix-like systems,NUL:orNULon DOS and CP/M,nulon newer Windows systems (internally\Device\Nullon Windows NT),NIL:on Amiga operating systems, andNL:on OpenVMS. In Windows Powershell, the equivalent is$null. The null device provides no data to any process that reads from it, yielding EOF immediately. In IBM DOS/360, OS/360 (MFT, MVT), OS/390, and z/OS operating systems, such files would be assigned in JCL toDD DUMMY. ← Wikipedia
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