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remctl

NAME

remctl - Remote execution tool

SYNOPSIS

remctl [-dhv] [-p port] [-s service] host type
    service [parameters ...]

DESCRIPTION

remctl is a program that allows a user to execute commands remotely on a server that is running the remctld deamon. remctl does not interpret the commands given to it, it passes them to the server and displays the return message. The commands must be defined on the server-side before a remctl client can execute them, and the user running remctl must be authorized to execute the particular command on the server.

Access to remote commands is authenticated via Kerberos v5 GSS-API, so a user must have a ticket granting ticket to use remctl. All transmissions to and from the remctld server are encrypted using GSS-API's security layer.

host is the hostname of the target server. type and service together specify the command to run and correspond to the command names in the configuration file on the server. parameters are any additional command-line parameters to pass to the remote command.

OPTIONS

-d

Turn on extra debugging output of the client-server interaction.

-h

Show a brief usage message and then exit.

-p port

Connect to the server on port. If this option isn't given, the client first tries the registered remctl port (4373) and then falls back on the legacy port (4444) if that fails.

-s service

Authenticate to the server with a service ticket for service rather than the default server identity of host/hostname. This may be necessary with, for instance, a server where remctld is not running as root.

-v

Print the version of remctl and exit.

EXIT STATUS

remctl will exit with the exit status returned by the remote command. If some network or authentication error occurred and remctl was unable to run the remote command or retrieve its exit status, or if remctl was called with invalid arguments, remctl will exit with status 1.

EXAMPLES

Release an afs volume called ls.tripwire:

     remctl lsdb afs release ls.tripwire
 
 

CAVEATS

When using Heimdal with triple-DES keys and talking to old servers that only speak version one of the remctl protocol, remctl may have problems with MIC verification. This doesn't affect new clients and servers since the version two protocol doesn't use MICs. If you are using Heimdal and run into MIC verification problems, see the COMPATIBILITY section of gssapi(3).

The default behavior, when the port is not specified, of trying 4373 and falling back to 4444 will be removed in a future version of remctl in favor of using the "remctl" service in /etc/services if set and then falling back on only 4373. 4444 was the poorly-chosen original remctl port and should be phased out.

NOTES

The remctl port number, 4373, was derived by tracing the diagonals of a QWERTY keyboard up from the letters "remc" to the number row.

SEE ALSO

kinit(1), remctld(8)

The current version of this program is available from its web page at <http://www.eyrie.org/~eagle/software/remctl/>.

AUTHOR

Anton Ushakov <antonu@stanford.edu> is the original author. Updates and current maintenance are done by Russ Allbery <rra@stanford.edu>.

COPYRIGHT AND LICENSE

Copyright 2002, 2003, 2004, 2005, 2006 Board of Trustees, Leland Stanford Jr. University. All rights reserved.

Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of Stanford University not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. Stanford University makes no representations about the suitability of this software for any purpose. It is provided ``as is'' without express or implied warranty.

THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.