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null(7)
NAME
null - Data sinkDESCRIPTION
Data written on a null special file are discarded. Reads from a null special file always return 0 (zero) bytes.EXAMPLES
To read a device and discard all the data using the dd command: dd if=/dev/rz1c of=/dev/null To create a zero length file using the cat command: cat > foo < /dev/nullFILES
/dev/null