Provided by: shellinabox_2.21_amd64
shellinaboxd - publish command line shell through AJAX interface
shellinaboxd [ -b | --background[=pidfile] ] [ -c | --cert=certdir ] [ --cert-fd=fd ] [ --css=filename ] [ --cgi[=portrange] ] [ -d | --debug ] [ -f | --static- file=url:file ] [ -g | --group=gid ] [ -h | --help ] [ --linkify=[none|normal|aggressive] ] [ --localhost-only ] [ --no-beep ] [ -n | --numeric ] [ --pidfile=pidfile ] [ -p | --port=port ] [ -s | --service=service ] [ -t | --disable-ssl ] [ --disable-ssl-menu ] [ -q | --quiet ] [ -u | --user=uid ] [ --user-css=styles ] [ -v | --verbose ] [ --version ]
There are no configuration files or permanent settings for shellinaboxd. A small number of run-time configuration options are available from a context menu that becomes available when clicking the right mouse button. These options get persisted in a browser cookie. Many sites already have a web server running and would like to integrate shellinaboxd into their existing site. This is most commonly done by means of a reverse-proxy entry for the main web server. For Apache this would require adding an option such as: <Location /shell> ProxyPass http://localhost:4200/ Order allow,deny Allow from all </Location> If you are using a different web server, refer to that server's documentation on how to configure reverse proxy operations. When using a reverse proxy, the --localhost-only option would normally be enabled as well. In addition, the --disable-ssl might also be considered depending on the exact configuration details of the reverse proxy.
shellinaboxd Attaches a web-enabled login shell to https://localhost:4200/. If the user connected without SSL, the session will automatically be promoted. Unless SSL certificates can be found in the current directory, the daemon will automatically generate suitable self-signed certificates. If the command was invoked by a non-root user, the daemon uses ssh instead of /bin/login for the session. shellinaboxd -t Attaches a web-enabled login shell to http://localhost:4200/ with SSL/TLS support disabled. shellinaboxd -t -f beep.wav:/dev/null Runs all services with the audible-bell permanently disabled. shellinaboxd -s /:SSH:example.org The terminal connects to a ssh session on example.org. shellinaboxd -t -s /:AUTH:HOME:/bin/bash Interactively request the user's name and password prior to launching a Bourne shell. This command can be run by unprivileged users. But if doing so, it only allows this particular user to log in. shellinaboxd -c certificates -u shellinabox -g shellinabox If the certificates directory exists and is writable by the shellinabox user and group, self-signed SSL certificates will be generated in this directory. This might require creating an appropriately named user first. Running this command as root allows any user on the system to log in at http://localhost:4200/. Sessions will automatically be promoted to SSL/TLS. shellinaboxd -t -s /:LOGIN -s /who:nobody:nogroup:/:w In addition to the login shell at http://localhost:4200, show a list of currently logged in users when accessing http://localhost:4200/who. This command must be run as root in order to be able to change to nobody:nogroup as requested by the service description. shellinaboxd -t -s '/:root:root:/:wy60 -c /bin/login' Instead of the standard ANSI/VT100 terminal, publish a Wyse 60™ terminal. Again, this command should be run as root. shellinaboxd --css white-on-black.css Loads the white-on-black.css style sheet from the current directory and appends it to the built-in styles.css sheet. This causes the terminal to always render white text on a black background. shellinaboxd --user-css Normal:+black-on-white.css,Reverse:-white-on-black.css Allow the user to select whether they want text to be rendered normally or in reverse video. This command line option adds a new entry to the right-click context menu.
The daemon returns a non-zero exit code in case of failure. With the exception of a small number of common error cases that are handled explicitly, most errors result in printing a "Check failed" message. This does not typically indicate a bug in the program but is instead its normal way of reporting errors. Common failure conditions are reusing a port that is already in use, lack of sufficient privileges to run a service, failure to find SSL/TLS certificates, and failure to write newly generated certificates to the certification directory.
The daemon uses privilege separation techniques to allow it to drop privileges early. It is aware of setuid flags and restricts some operations when launched as a setuid application. Despite these safety features, a bug could conceivably lead to a determined attacker gaining elevated privileges. It is therefore strongly discouraged to set the setuid flag on the binary. The expected deployment would be from a system rc script launched by /sbin/init. For extra security, the --group and --user options should be used to change to a dedicated user.
Copyright (C) 2008-2010 by Markus Gutschke <firstname.lastname@example.org>. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA In addition to these license terms, the author grants the following additional rights: If you modify this program, or any covered work, by linking or combining it with the OpenSSL project's OpenSSL library (or a modified version of that library), containing parts covered by the terms of the OpenSSL or SSLeay licenses, the author grants you additional permission to convey the resulting work. Corresponding Source for a non-source form of such a combination shall include the source code for the parts of OpenSSL used as well as that of the covered work. You may at your option choose to remove this additional permission from the work, or from any part of it. If you would like to negotiate different licensing terms that are compatible for integration with other projects, please contact the author. If the OpenSSL system libraries can be found at run-time, they will be invoked by shellinaboxd to provide SSL/TLS support. The OpenSSL and SSLeay licenses require the following notices: This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. (http://www.openssl.org/) This product includes cryptographic software written by Eric Young (email@example.com)
Due to browser limitations, some features might not be available to users of all browers. Konqueror does not allow for reliable interception of CTRL keys. If you press a key together with the CTRL modifier, it continues performing the browser's predefined behavior for this particular key combination. In most cases, it also fails to report the correct key to the terminal emulator. As a work-around, pressing both the CTRL and the WINDOWS key sometimes works. Some browsers, most notably IE on Windows, disallow interception of ALT keys and always interpret these keys as menu accelerators. As a work-around, many UNIX applications allow pressing ESC, instead of ALT. When using non-US keyboard layouts, some browser do not allow for reliably determining shifted ALT keys. Please report these cases if they turn out to be a problem, as work- arounds might be possible. Access to the native clipboard is typically not possible. Instead, an internal clipboard accessible from the right-button context menu is used for all but IE. Some browsers restrict the number of concurrent connections to a server. This restricts how many AJAX terminals can be opened simultaneously. If this becomes a problem, users can typically reconfigure their browsers to raise the limit. There have been reports of the VLC plugin on Linux/x86_64 crashing Firefox when the browser page gets reloaded. Setting the --no-beep option eliminates all references to VLC and thus appears to work around this crash. Sep 11, 2010 SHELLINABOXD(1)