rlogin - phpMan

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RLOGIN(1)                                                            RLOGIN(1)



NAME
       rlogin - remote login

SYNOPSIS
       rlogin  rhost  [-ec]  [-8] [-c] [ -a] [-f] [-F] [-t termtype] [-n] [-7] [-PN | -PO]
       [-4] [-d] [-k realm] [-x] [-L] [-l username]


DESCRIPTION
       Rlogin connects your terminal on the current local host system lhost to the  remote
       host system rhost.

       The  version  built  to use Kerberos authentication is very similar to the standard
       Berkeley rlogin(1), except that instead of the rhosts mechanism, it  uses  Kerberos
       authentication to determine the authorization to use a remote account.

       Each  user  may  have  a private authorization list in a file .k5login in his login
       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 .k5login, access is granted to the account.  If there is no
       /.k5login  file,  the  principal will be granted access to the account according to
       the aname->lname mapping rules.  (See krb5_anadd(8) for more details.)  Otherwise a
       login  and  password will be prompted for on the remote machine as in login(1).  To
       avoid some security problems, the .k5login file must be owned by the remote user.

       If there is some problem in marshaling the Kerberos authentication information,  an
       error  message  is  printed and the standard UCB rlogin is executed in place of the
       Kerberos rlogin.

       A line of the form ‘‘~.’’ disconnects from the remote  host,  where  ‘‘~’’  is  the
       escape character.  Similarly, the line ‘‘~^Z’’ (where ^Z, control-Z, is the suspend
       character) will suspend the rlogin session.  Substitution  of  the  delayed-suspend
       character  (normally ^Y) for the suspend character suspends the send portion of the
       rlogin, but allows output from the remote system.

       The remote terminal type is the same as your local terminal type (as given in  your
       environment  TERM  variable),  unless  the -t option is specified (see below).  The
       terminal or window size is also copied to the remote system if the server  supports
       the option, and changes in size are reflected as well.

       All  echoing takes place at the remote site, so that (except for delays) the rlogin
       is transparent.  Flow control via ^S and ^Q and flushing of  input  and  output  on
       interrupts are handled properly.

OPTIONS
       -8     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.  Eight-bit mode is the default.

       -L     allows the rlogin session to be run in litout mode.

       -ec    sets  the  escape  character to c.  There is no space separating this option
              flag and the new escape character.

       -c     require confirmation before disconnecting via ‘‘~.’’

       -a     force the remote machine to ask for a password by sending a null local user-
              name.   This option has no effect unless the standard UCB rlogin is executed
              in place of the Kerberos rlogin (see above).

       -f     forward a copy of the local credentials to the remote system.

       -F     forward a forwardable copy of the local credentials to the remote system.

       -t termtype
              replace the terminal type passed to the remote host with termtype.

       -n     prevent suspension of rlogin via ‘‘~^Z’’ or ‘‘~^Y’’.

       -7     force seven-bit transmissions.

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

       -k     request  rlogin to obtain tickets for the remote host in realm realm instead
              of the remote host’s realm as determined by krb_realmofhost(3).

       -x     turn on DES encryption for data passed via the rlogin session.  This applies
              only to input and output streams, so the username is sent unencrypted.  This
              significantly reduces response time and significantly increases CPU utiliza-
              tion.

       -PN

       -PO    Explicitly  request  new  or  old version of the Kerberos ‘‘rcmd’’ protocol.
              The new protocol avoids many security problems found in the old one, but  is
              not interoperable with older servers.  (An "input/output error" and a closed
              connection is the most likely result of attempting  this  combination.)   If
              neither  option is specified, some simple heuristics are used to guess which
              to try.

       -4     Use Kerberos V4 authentication only; don’t try Kerberos V5.

SEE ALSO
       rsh(1), kerberos(3), krb_sendauth(3), krb_realmofhost(3), rlogin(1) [UCB  version],
       klogind(8)

FILES
       ~/.k5login  (on remote host) - file containing Kerberos principals that are allowed
                   access.

BUGS
       More of the environment should be propagated.



                                                                     RLOGIN(1)

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