| rlogin | [ -468dEn] [-echar] [-lusername] [-pport] host | 
  
    | rlogin | [ -468dEn] [-echar] [-pport] username@host | 
rlogin starts a terminal session on a remote host
  host.
rlogin first attempts to use the standard
    Berkeley rhosts authorization mechanism. The options are
    as follows:
  - -4
- Use IPv4 addresses only.
- -6
- Use IPv6 addresses only.
- -8
- The -8option allows an eight-bit input data path
      at all times; otherwise parity bits are stripped except when the remote
      side's stop and start characters are other than
    ‘^S/^Q’.
- -d
- The -doption turns on socket debugging (see
      setsockopt(2)) on the
      TCP sockets used for communication with the remote host.
- -E
- The -Eoption stops any character from being
      recognized as an escape character. When used with the-8option, this provides a completely transparent
      connection.
- -echar
- The -eoption allows user specification of the
      escape character, which is “~” by default. This
      specification may be as a literal character, or as an octal value in the
      form \nnn.
- -lusername
- the -loption specifies an alternate
      username for the remote login. If this option is not
      specified, your local username will be used.
- -n
- Set the TCP_NODELAYsocket option, which can
      improve interactive responsiveness at the possible downside of increased
      network load.
- -pport
- Uses the given port instead of the one assigned to
      the service “login”. May be given either as symbolic name or
      as number.
A line of the form “⟨escape char⟩.”
    disconnects from the remote host. Similarly, the line “⟨escape
    char⟩^Z” will suspend the rlogin
    session, and “⟨escape char⟩⟨delayed-suspend
    char⟩” suspends the send portion of the rlogin, but allows
    output from the remote system. By default, the tilde (“~”)
    character is the escape character, and normally control-Y
    (“^Y”) is the delayed-suspend character.
All echoing takes place at the remote site, so that (except for
    delays) the rlogin is transparent. Flow control via
    ^S/^Q and flushing of input and output on interrupts are handled
  properly.
The following environment variable is used by rlogin:
  - TERM
- Determines the user's terminal type.
Therlogin command appeared in
  4.2BSD.
More of the environment should be propagated.