Rlogin the father of SSH


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rlogin (remote login) is a Unix command that allows an authorized user to login to other UNIX machines (hosts) on a network and to interact as if the user were physically at the host computer. Once logged in to the host, the user can do anything that the host has given permission for, such as read, edit, or delete files.

It was first distributed as part of the 4.2BSD release.

rlogin is also the name of the application layer protocol used by the software, part of the TCP/IP protocol suite. Authenticated users can act as if they were physically present at the computer. RFC 1258, in which it was defined, states that: “The rlogin facility provides a remote-echoed, locally flow-controlled virtual terminal with proper flushing of output.” rlogin communicates with a daemon, rlogind, on the remote host. rlogin is similar to the Telnet command, but has the disadvantage of not being as customizable and being able to connect only to Unix hosts.


How to  connect   from Putty :

connect from Linux /unix  machine