/dev/zero

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/ dev / zero - A virtual machine in unix-like operating systems that provides null characters, which is 0 (the NULL character of the ASCII code, not to be confused with the "0" digit in the ASCII value of 0x30). The most common use is to provide characters to overwrite data. It is also used to create clean files of the specified size.

Unlike / dev / null, which is used to delete data, / dev / zero is the data source. Example of use dd if=/dev/zero of=przyklad bs=1k count=100



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