Virt-Viewer(1) | Virtualization Support | Virt-Viewer(1) |
virt-viewer - display the graphical console for a virtual machine
virt-viewer [OPTIONS] [ID|UUID|DOMAIN-NAME]
virt-viewer is a minimal tool for displaying the graphical console of a virtual machine. The console is accessed using the VNC or SPICE protocol. The guest can be referred to based on its name, ID, or UUID. If the guest is not already running, then the viewer can be told to wait until it starts before attempting to connect to the console. The viewer can connect to remote hosts to lookup the console information and then also connect to the remote console using the same network transport.
In some circumstances the viewer may need to grab the mouse pointer. The default key sequence for releasing the grab is "Ctrl_L"+"Alt_L", however, this can be overridden using the "--hotkeys" argument documented below.
The following options are accepted when running "virt-viewer":
If supported, the remote display will be reconfigured to match the physical client monitor configuration, by enabling or disabling extra monitors as necessary. This is currently implemented by the Spice backend only.
To specify which client monitors are used in fullscreen mode, see the CONFIGURATION section below.
--hotkeys=toggle-fullscreen=shift+f11,release-cursor=shift+f12 --hotkeys=release-cursor=ctrl+alt
Note that hotkeys for which no binding is given are disabled. Although the hotkeys specified here are handled by the client, it is still possible to send these key combinations to the guest via a menu item.
Running the application with --debug will display keypress
symbols in the following way:
"Key pressed was keycode='0x63', gdk_keyname='c'"
"Key pressed was keycode='0xffeb', gdk_keyname='Super_L'"
The format for supplying a keymap is: <srcKeySym1>=[<destKeySym1>][+<destKeySym2][,<srckeySym2>=[<destKeySym1]
To block a keypress simply assign an empty parameter to the srcKeySym.
Example:
--keymap=Super_L=,Alt_L=,1=Shift_L+F1,2=Shift_L+F2
This will block the Super_L (typically Windows Key) and ALT_L keypresses and remap key 1 to Shift F1, 2 to Shift F2.
Note that it can't offer a complete secure solution by itself. Your kiosk system must have additional configuration and security settings to lock down the OS. In particular, you must configure or disable the window manager, limit the session capabilities, use some restart/watchdog mechanism, disable VT switching etc.
virt-viewer 2
To always connect to the virtual machine with the name "2" use the "--domain-name" option:
virt-viewer --domain-name 2
A small number of configuration options can be controlled by editing the settings file located in the user configuration directory:
<USER-CONFIG-DIR>/virt-viewer/settings
This file is a text file in INI format, with application options in the [virt-viewer] group and per-guest options in a group identified by the guest's UUID. The application options should not be edited manually. There is also a special [fallback] group which specifies options for all guests that don't have an explicit group.
For each guest, the initial fullscreen monitor configuration can be specified by using the monitor-mapping key. This configuration only takes effect when the -f/--full-screen option is specified.
The value of this key is a list of mappings between a guest display and a client monitor. Each mapping is separated by a semicolon character, and the mappings have the format <GUEST-DISPLAY-ID>:<CLIENT-MONITOR-ID>.
For example, to map guest displays 1 and 2 to client monitors 2 and 3 for the guest with a UUID of e4591275-d9d3-4a44-a18b-ef2fbc8ac3e2, use:
[e4591275-d9d3-4a44-a18b-ef2fbc8ac3e2] monitor-mapping=1:2;2:3
The monitor-mapping must contain ids of all displays from 1 to the last desired display id, e.g. "monitor-mapping=3:3" is invalid because mappings for displays 1 and 2 are not specified.
To connect to the guest called 'demo' running under Xen
virt-viewer demo
To use GUI for connecting to a guest running under QEMU
virt-viewer --connect qemu:///system
To connect to the guest with ID 7 running under QEMU
virt-viewer --connect qemu:///system 7
To wait for the guest with UUID 66ab33c0-6919-a3f7-e659-16c82d248521 to startup and then connect, also reconnecting upon restart of VM
virt-viewer --reconnect --wait 66ab33c0-6919-a3f7-e659-16c82d248521
To connect to a remote console using TLS
virt-viewer --connect xen://example.org/ demo
To connect to a remote host using SSH, lookup the guest config and then make a tunnelled connection of the console
virt-viewer --connect qemu+ssh://root@example.org/system demo
When using a SSH tunnel to connect to a SPICE console, it's recommended to have ssh-agent running to avoid getting multiple authentication prompts.
To connect to a remote host using SSH, lookup the guest config and then make a direct non-tunnelled connection of the console
virt-viewer --direct --connect xen+ssh://root@example.org/ demo
Written by Daniel P. Berrange, based on the GTK-VNC example program gvncviewer.
Report bugs to https://gitlab.com/virt-viewer/virt-viewer/-/issues
Copyright (C) 2007-2020 Red Hat, Inc., and various contributors. This is free software. You may redistribute copies of it under the terms of the GNU General Public License "https://www.gnu.org/licenses/gpl-2.0.html". There is NO WARRANTY, to the extent permitted by law.
virsh(1), "virt-manager(1)", "spice-client(1)", the project website "http://gitlab.com/virt-viewer/virt-viewer"
2022-08-02 | Virt-Viewer 11.0 |