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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 |first1=James |last1=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>
The r-commands were a significant innovation, and became ''de facto'' standards for Unix operating systems.<ref>Casad (2008), p. [https://books.google.com/books?id=q81cs5140_YC&pg=PT346 346]</ref><ref>{{cite book |title=Red Hat Fedora Linux 2 Bible |last=Negus |first=Christopher |publisher=Wiley |isbn=0-7645-5745-9 |oclc=441918216 |chapter=About "r" Commands |chapter-url=https://www.wiley.com/legacy/compbooks/negus/rhbf2/r-commands.html |access-date=2018-03-04|date=2004-07-02 }}</ref> With wider public adoption of the Internet, their inherent security vulnerabilities became a problem,<ref>{{Cite document
==Authentication==
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