Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
RLOGIN(1)               FreeBSD General Commands Manual              RLOGIN(1)

     rlogin -- remote login

     rlogin [-468DEKLdx] [-e char] [-i localname] [-k realm] [-l username]

     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 options
     are as follows:

     -4    Use IPv4 addresses only.

     -6    Use IPv6 addresses only.

     -8    The -8 option 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 -D option sets the TCP_NODELAY socket option which can improve
           interactive response at the expense of increased network load.

     -E    The -E option stops any character from being recognized as an
           escape character.  When used with the -8 option, this provides a
           completely transparent connection.

     -K    The -K option turns off all Kerberos authentication.

     -L    The -L option allows the rlogin session to be run in ``litout''
           (see tty(4)) mode.

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

     -e    The -e option 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.

     -i    The -i option allows the caller to specify a different local name
           to be used for authentication.  This option is restricted to pro-
           cesses with uid 0.

     -k    The -k option requests rlogin to obtain tickets for the remote host
           in realm realm instead of the remote host's realm as determined by

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

     -x    The -x option turns on DES encryption for all data passed via the
           rlogin session.  This may impact response time and CPU utilization,
           but provides increased security.

     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.

     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

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

     The following environment variable is utilized by rlogin:

     TERM  Determines the user's terminal type.

     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)


     The rlogin command appeared in 4.2BSD.

     IPv6 support was added by WIDE/KAME project.

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

     More of the environment should be propagated.

FreeBSD 4.10                     June 6, 1993                     FreeBSD 4.10


Want to link to this manual page? Use this URL:

home | help