RLOGIN(1)

NAME

     rlogin -- remote login

SYNOPSIS

     rlogin [-468DEd] [-e char] [-i localname] [-l username] host

DESCRIPTION

     The rlogin utility starts a terminal session on a remote host host.

     The rlogin utility first attempts to use the Kerberos authorization mech-
     anism, described below.  If the remote host does not support Kerberos the
     standard Berkeley rhosts authorization mechanism is used.

     The following options are available:

     -4    Use IPv4 addresses only.

     -6    Use IPv6 addresses only.

     -8    Allow 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    Set the TCP_NODELAY socket option which can improve interactive
	   response at the expense of increased network load.

     -E    Stop any character from being recognized as an escape character.
	   When used with the -8 option, this provides a completely transpar-
	   ent connection.

     -d    Turn on socket debugging (see setsockopt(2)) on the TCP sockets
	   used for communication with the remote host.

     -e    Allow 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.

     -i    Allow the caller to specify a different local name to be used for
	   authentication.  This option is restricted to processes with uid 0.

     -l    Specify a different username for the remote login.  If this option
	   is not specified, your local username will be used.

     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 session, but allows output from the remote system.  By
     default, the tilde (``~'') character is the escape character, and nor-
     mally 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.

KERBEROS AUTHENTICATION

     Each user may have a private authorization list in the file .klogin in
     their home directory.  Each line in this file should contain a Kerberos
     principal name of the form principal.instance@realm.  If the originating
     user is authenticated to one of the principals named in .klogin, access
     is granted to the account.  The principal accountname.@localrealm is
     granted access if there is no .klogin file.  Otherwise a login and pass-
     word will be prompted for on the remote machine as in login(1).  To avoid
     certain security problems, the .klogin file must be owned by the remote
     user.

     If Kerberos authentication fails, a warning message is printed and the
     standard Berkeley rlogin is used instead.

ENVIRONMENT

     The following environment variable is utilized by rlogin:

     TERM  Determines the user's terminal type.

SEE ALSO

     login(1), rsh(1), telnet(1), setsockopt(2), kerberos(3),
     krb_realmofhost(3), krb_sendauth(3), ruserok(3), tty(4), auth.conf(5),
     hosts(5), hosts.equiv(5), rlogind(8), rshd(8)

FILES

     /etc/hosts
     /etc/hosts.equiv
     /etc/auth.conf
     $HOME/.rhosts
     $HOME/.klogin

HISTORY

     The rlogin command appeared in 4.2BSD.

     IPv6 support was added by WIDE/KAME project.

BUGS

     The rlogin utility will be replaced by telnet(1) in the near future.

     More of the environment should be propagated.