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-.\" Open Infrastructure: compute-tools
-.\"
-.\" Copyright (C) 2014-2021 Daniel Baumann <daniel.baumann@open-infrastructure.net>
-.\"
-.\" SPDX-License-Identifier: GPL-3.0+
-.\"
-.\" This program is free software: you can redistribute it and/or modify
-.\" it under the terms of the GNU General Public License as published by
-.\" the Free Software Foundation, either version 3 of the License, or
-.\" (at your option) any later version.
-.\"
-.\" 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, see <https://www.gnu.org/licenses/>.
-.\"
-.
-.TH CONTAINER-SHELL 1 compute-tools "Open Infrastructure"
-.SH NAME
-container-shell \- Manage systemd-nspawn containers (shell)
-.
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-..
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-.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
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-..
-.SH SYNOPSIS
-.nf
-\fBcontainer\-shell\fP [\(aqOPTIONS\(aq]
-\fBcntsh\fP [\(aqOPTIONS\(aq]
-.fi
-.sp
-.SH DESCRIPTION
-.sp
-compute\-tools provides the system integration for managing containers using
-systemd\-nspawn.
-.SS Usage
-.sp
-Although the \fBcontainer\-shell\fP can be started from a running system like any
-other program, the main intend is to use the \fBcontainer\-shell\fP via SSH. That
-way otherwise unprivileged users have possibility to manage containers without
-needing a regular shell login on the container server.
-.sp
-For usage over SSH a unprivileged user should be created:
-.nf
-
-.in +2
-sudo adduser \-\-gecos "compute\-tools,,," \e
-.in +2
-\-\-home /var/lib/open\-infrastructure/container\-shell \e
-\-\-shell /usr/bin/container\-shell
-.in -2
-.in -2
-.fi
-.sp
-.sp
-The container\-shell can then be allowed for specific SSH keys via
-/var/lib/compute\-tools/container\-shell/.ssh/authorized_keys like so:
-.nf
-
-.in +2
-command="/usr/bin/container\-shell",no\-port\-forwarding,no\-X11\-forwarding,\e
-.in +2
-no\-agent\-forwarding,no\-pty ssh\-ed25519 [...]
-.in -2
-.in -2
-.fi
-.sp
-.SS Restricted shell
-.sp
-The container\-shell by default grants any user that has access to it to use all available container commands.
-.sp
-Through two corresponding environment variables users can be allowed or disallowed to use specific container commands.
-In connection with SSH this makes it possible to grant certain SSH keys (and by that, users) privileges to operate container
-servers without having to give them root access, a login shell at all and prevents them from doing things they are not trusted to do.
-.SS Example (blacklisting)
-.sp
-In order to allow all commands except for removing and stopping containers, the
-following variable can be used:
-.nf
-
-.in +2
-command="CONTAINER_COMMANDS_DISABLE=\(aqremove stop\(aq \e
-.in +2
-/usr/bin/container\-shell",no\-port\-forwarding,no\-X11\-forwarding,\e
-no\-agent\-forwarding,no\-pty ssh\-ed25519 [...]
-.in -2
-.in -2
-.fi
-.sp
-.SS Example (whitelisting)
-.sp
-The other way around works too. To disallow all commands except for listing
-containers and showing the compute\-tools version, the following variable can be
-used:
-.nf
-
-.in +2
-command="CONTAINER_COMMANDS_ENABLE=\(aqlist version\(aq \e
-.in +2
-/usr/bin/container\-shell",no\-port\-forwarding,no\-X11\-forwarding,\e
-no\-agent\-forwarding,no\-pty ssh\-ed25519 [...]
-.in -2
-.in -2
-.fi
-.sp
-.SH COMMANDS
-.sp
-All container commands are available, see container(1). Additionally, the
-following commands are specific to container\-shell:
-.INDENT 0.0
-.TP
-.B about:
-Shows introduction (manpage).
-.TP
-.B help:
-Shows available commands within the container\-shell.
-.TP
-.B help COMMAND:
-Shows help (manpage) for a specific container command.
-.TP
-.B logout, exit:
-Exits container\-shell.
-.UNINDENT
-.SH SEE ALSO
-.nf
-compute\-tools(7),
-container(1).
-.fi
-.sp
-.SH HOMEPAGE
-.sp
-More information about compute\-tools and the Open Infrastructure project can be
-found on the homepage (\fI\%https://open\-infrastructure.net\fP).
-.SH CONTACT
-.sp
-Bug reports, feature requests, help, patches, support and everything else are
-welcome on the Open Infrastructure Software Mailing List
-<\fI\%software@lists.open\-infrastructure.net\fP>.
-.sp
-Debian specific bugs can also be reported in the Debian Bug Tracking System
-(\fI\%https://bugs.debian.org\fP).
-.SH AUTHORS
-.sp
-compute\-tools were written by Daniel Baumann
-<\fI\%daniel.baumann@open\-infrastructure.net\fP> and others.
-.