![]() In 1974, the dd command appeared as part of Version 5 Unix. 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. 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. 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 driver. ![]() Unix, Unix-like, Plan 9, Inferno, WindowsÄd is a command-line utility for Unix, Plan 9, Inferno, and Unix-like operating systems and beyond, the primary purpose of which is to convert and copy files. Various open-source and commercial developersĬoreutils: git. Command-line utility for Unix and Unix-like operating systems dd Original author(s)
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