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{{IPstack}}
The '''Berkeley r-commands''' are a [[Software suite|suite]] of [[computer program]]s designed to enable users of one [[Unix]] system to [[log in]] or issue [[Command (computing)|commands]] to another [[Unix]] computer via [[TCP/IP]] [[computer network]].<ref>{{cite book |title=Unix System Management: Primer Plus |last=Horwitz |first=Jeff |chapter=Using the Berkeley r-commands Without a Password |chapter-url=https://books.google.com/books?id=-sue_SyjuCMC&pg=PA339 |page=339 |year=2003 |orig-year=2002 |publisher=Sams Publishing |via=Google Books |isbn=978-0-672-32372-0 |access-date=2018-03-04}}</ref> The r-commands were developed in 1982 by the [[Computer Systems Research Group]] at the [[University of California, Berkeley]], based on an early implementation of [[TCP/IP]] (the [[protocol stack]] of the [[Internet]]).<ref name="McKusick">{{cite book |title=[[Open Sources: Voices from the Open Source Revolution]] |last=McKusick |first=Marshall Kirk |authorlink=Marshall Kirk McKusick |year=1999 |isbn=978-1-56592-582-3 |chapter=Twenty Years of Berkeley Unix: From AT&T-Owned to Freely Redistributable |chapter-url=http://www.oreilly.com/openbook/opensources/book/kirkmck.html |publisher=O'Reilly & Associates |at=[https://archive.org/details/isbn_9781565925823/page/ Section: "4.2BSD"] |access-date=2018-03-03 }}</ref>
The CSRG incorporated the r-commands into their [[Unix]] [[operating system]], the [[Berkeley Software Distribution]] (BSD). The r-commands premiered in BSD v4.1.<ref name="McKusick"/> Among the programs in the suite are: {{code|rcp}} (remote [[File copying|copy]]), {{code|rexec}} (remote [[Execution (computing)|execution]]), {{code|rlogin}} (remote [[login]]), {{code|rsh}} (remote [[Shell (computing)|shell]]), {{code|rstat}}, {{code|ruptime}}, and {{code|rwho}} (remote [[who (Unix)|who]]).<ref name="McKusick"/><ref>{{cite book |title=Guide to TCP/IP: IPv6 and IPv4 |first=James |last=Pyles |first2=Jeffrey L. |last2=Carrell |first3=Ed |last3=Tittel |chapter=Which IP Services Are Most Vulnerable? |chapter-url=https://books.google.com/books?id=sQevDAAAQBAJ&pg=PA659 |page=659 |publisher=Cengage Learning |year=2017 |edition=5th |isbn=978-1-305-94695-8 |via=Google Books}}</ref>
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