Linux tutorial for beginners 13 - DD command in linux | Linux CLI | COPY file in linux смотреть онлайн

dd is a command-line utility for Unix and Unix-like operating systems whose primary purpose is to convert and copy files.

On Unix, device drivers for hardware (such as hard disk drives) and special device files (such as /dev/zero and /dev/random) appear in the file system just like normal files.
dd can also read and/or write from/to these files, provided that function is implemented in their respective drivers
As a result, dd can be used for tasks such as backing up the boot sector of a hard drive, and obtaining a fixed amount of random data.
The dd program can also perform conversions on the data as it is copied, including byte order swapping and conversion to and from the ASCII and EBCDIC text encodings.
Usage : The command line syntax of dd differs from many other Unix programs, in that 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 reads from stdin and writes to stdout, but these can be changed by using the if (input file) and of (output file) options.

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