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  2. cksum - Wikipedia

    en.wikipedia.org/wiki/Cksum

    cksum is a command in Unix and Unix-like operating systems that generates a checksum value for a file or stream of data. The cksum command reads each file given in its arguments, or standard input if no arguments are provided, and outputs the file's 32-bit cyclic redundancy check (CRC) checksum and byte count. [1]

  3. Diehard tests - Wikipedia

    en.wikipedia.org/wiki/Diehard_tests

    Analyze sequences of five consecutive random numbers. The 120 possible orderings should occur with statistically equal probability. This is the OPERM5 test. It looks at a sequence of one million 32-bit random integers. Each set of five consecutive integers can be in one of 120 states, for the 5! possible orderings of five numbers.

  4. Bit array - Wikipedia

    en.wikipedia.org/wiki/Bit_array

    Assuming its size (or length) to be n bits, the array can be used to specify a subset of the domain (e.g. {0, 1, 2, ..., n−1}), where a 1-bit indicates the presence and a 0-bit the absence of a number in the set. This set data structure uses about n/w words of space, where w is the number of bits in each machine word.

  5. Run-length encoding - Wikipedia

    en.wikipedia.org/wiki/Run-length_encoding

    Run-length encoding (RLE) is a form of lossless data compression in which runs of data (consecutive occurrences of the same data value) are stored as a single occurrence of that data value and a count of its consecutive occurrences, rather than as the original run. As an imaginary example of the concept, when encoding an image built up from ...

  6. Extended file attributes - Wikipedia

    en.wikipedia.org/wiki/Extended_file_attributes

    Unlike forks, which can usually be as large as the maximum file size, extended attributes are usually limited in size to a value significantly smaller than the maximum file size. Typical uses include storing the author of a document, the character encoding of a plain-text document, or a checksum , cryptographic hash or digital certificate , and ...

  7. List of file formats - Wikipedia

    en.wikipedia.org/wiki/List_of_file_formats

    PY, PYW – Python code file; PMP – PenguinMod Project; PMS – PenguinMod Sprite; RAR – RAR Rar Archive, for multiple file archive (rar to .r01-.r99 to s01 and so on) RAG, RAGS – Game file, a game playable in the RAGS game-engine, a free program which both allows people to create games, and play games, games created have the format "RAG ...

  8. Stride of an array - Wikipedia

    en.wikipedia.org/wiki/Stride_of_an_array

    In computer programming, the stride of an array (also referred to as increment, pitch or step size) is the number of locations in memory between beginnings of successive array elements, measured in bytes or in units of the size of the array's elements. The stride cannot be smaller than the element size but can be larger, indicating extra space ...

  9. /dev/random - Wikipedia

    en.wikipedia.org/wiki/Dev/random

    The /dev/urandom device typically was never a blocking device, even if the pseudorandom number generator seed was not fully initialized with entropy since boot. Not all operating systems implement the same methods for /dev/random and /dev/urandom. This special file originated in Linux in 1994. It was quickly adopted by other Unix-like operating ...