Berkeley r-commands
Suite of remote-access utilities / From Wikipedia, the free encyclopedia
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The Berkeley r-commands are a suite of computer programs designed to enable users of one Unix system to log in or issue commands to another Unix computer via TCP/IP computer network.[1] 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).[2]
Developer(s) | Computer Systems Research Group at the University of California, Berkeley |
---|---|
Initial release | June 1981; 43 years ago (1981-06) |
Operating system | Unix and Unix-like |
Type | Command suite |
License | BSD |
The CSRG incorporated the r-commands into their Unix operating system, the Berkeley Software Distribution (BSD). The r-commands premiered in BSD v4.1.[2] Among the programs in the suite are: rcp
(remote copy), rexec
(remote execution), rlogin
(remote login), rsh
(remote shell), rstat
, ruptime
, and rwho
(remote who).[2][3]
The r-commands were a significant innovation, and became de facto standards for Unix operating systems.[4][5] With wider public adoption of the Internet, their inherent security vulnerabilities became a problem,[6] and beginning with the development of Secure Shell protocols and applications in 1995, its adoption entirely supplanted the deployment and use of r-commands (and Telnet) on networked systems.[7]