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    https://en.wikipedia.org › wiki › Dd_(Unix)

    dd (Unix) - Wikipedia

    History

    In 1974, the dd command appeared as part of Version 5 Unix. According to Dennis Ritchie, the name is an a… 展开

    Usage

    The command line syntax of dd differs from many other Unix programs. It uses the syntax option=value for its command-line options rather than the more standard -option value or --option=value formats. By default, dd read… 展开

    Block size

    A block is a unit measuring the number of bytes that are read, written, or converted at one time. Command-line options can specify a different block size for input/reading (ibs) compared to output/writing (o… 展开

    Uses

    The dd command can be used for a variety of purposes. For plain-copying commands it tends to be slower than the domain-specific alternatives, but it excels at its unique ability to "overwrite or truncate a file at any point or seek in … 展开

    dd命令 - 百度百科
    dd是 Linux / UNIX 下的一个非常有用的命令，作用是用指定大小的块拷贝一个文件，并在拷贝的同时进行指定的转换。 参数 1.if=文件名：输入文件名，缺省为标准输入。
    百度百科 · https://baike.baidu.com/item/dd命令
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