False. 'dd' is a JCL utility from IBM mainframes. Both the Unix command name and... | Hacker News

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		dredmorbius on April 6, 2020 \| parent \| context \| favorite \| on: WhyTheName False. 'dd' is a JCL utility from IBM mainframes. Both the Unix command name and syntax are directly lifted from the mainframe version of the ... data definition ... utility. https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/... https://groups.google.com/forum/m/#!msg/alt.folklore.compute... https://groups.google.com/forum/m/#!msg/alt.folklore.compute...

dfox on April 6, 2020 | [–]

DD in JCL is not an utility, but keyword. Its functionality is something between shell's IO redirection and mounting volumes inside docker containers. The syntax itself is not that obscure in the context of JCL and IBM OSes.

nailer on April 6, 2020 | [–]

I stand corrected (for those following, the second link above is by Dennis Ritchie himself).

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