How to install software
To permanently install new software in a template:
Start the template.
Start either a terminal (e.g.
gnome-terminal) or a dedicated software management application, such as
- Install software as normally instructed inside that operating system, e.g.:
sudo dnf install <PACKAGE_NAME>
sudo apt install <PACKAGE_NAME>
Shut down the template. (Do not skip this step.)
Restart all qubes based on the template. (Do not skip this step.)
- (Recommended) In the relevant qubes’ Qube Settings, go to the Applications tab, select the new application(s) from the list, and press OK. These new shortcuts will appear in the Applications Menu. (If you encounter problems, see here for troubleshooting.)
If things are still not working as expected:
- Review the instructions very carefully, making sure you follow each step.
- Make sure you shut down the template after installing your software.
- Make sure you restart your app qube after shutting down your template.
- If your software requires special files or directories to be persistent, and you’re an advanced user, see Standalones and HVMs and How to Make Any File Persistent (bind-dirs).
- Ask for help.
How to update software
Please see How to Update.
Why don’t templates have network access?
In order to protect you from performing risky activites in templates, they do not have normal network access. Instead, templates use an updates proxy that allows you to install and update software without giving the template direct network access.
The following sections cover advanced topics pertaining to installing and updating software in domUs.
If you wish to install updates that are still in testing, you must enable the appropriate testing repositories.
There are three Qubes VM testing repositories (where
* denotes the Release):
qubes-vm-*-current-testing– testing packages that will eventually land in the stable (
qubes-vm-*-security-testing– a subset of
qubes-vm-*-current-testingthat contains packages that qualify as security fixes
qubes-vm-*-unstable– packages that are not intended to land in the stable (
qubes-vm-*-current) repository; mostly experimental debugging packages
To temporarily enable any of these repos, use the
option. Example commands:
sudo dnf upgrade --enablerepo=qubes-vm-*-current-testing sudo dnf upgrade --enablerepo=qubes-vm-*-security-testing sudo dnf upgrade --enablerepo=qubes-vm-*-unstable
To enable or disable any of these repos permanently, change the corresponding
enabled value to
Debian also has three Qubes VM testing repositories (where
* denotes the
*-testing– testing packages that will eventually land in the stable (
*-securitytesting– a subset of
*-testingthat contains packages that qualify as security fixes
*-unstable– packages that are not intended to land in the stable repository; mostly experimental debugging packages
To enable or disable any of these repos permanently, uncomment the
deb line in
The process for installing and updating software in standalones is the same as described above for templates, except no qubes are based on standalones, so there are no other qubes to restart.
RPMFusion for Fedora templates
If you would like to enable the RPM Fusion repositories, open a Terminal of the template and type the following commands, depending on which RPM Fusion repositories you wish to enable (see RPM Fusion for details):
sudo dnf config-manager --set-enabled rpmfusion-free sudo dnf config-manager --set-enabled rpmfusion-free-updates sudo dnf config-manager --set-enabled rpmfusion-nonfree sudo dnf config-manager --set-enabled rpmfusion-nonfree-updates sudo dnf upgrade --refresh
This will permanently enable the RPM Fusion repos. If you install software from here, it’s important to keep these repos enabled so that you can receiving future updates. If you only enable these repos temporarily to install a package the Qubes update mechanism may persistently notify you that updates are available, since it cannot download them.
Reverting changes to a template
Perhaps you’ve just updated your template, and the update broke your template. Or perhaps you’ve made a terrible mistake, like accidentally confirming the installation of an unsigned package that could be malicious. If you want to undo changes to a template, there are three basic methods:
Root revert. This is appropriate for misconfigurations, but not for security concerns. It will preserve your customizations.
Reinstall the template. This is appropriate for both misconfigurations and security concerns, but you will lose all customizations.
Full revert. This is appropriate for both misconfigurations and security concerns, and it can preserve your customizations. However, it is a bit more complex.
Important: This command will roll back any changes made during the last time the template was run, but not before. This means that if you have already restarted the template, using this command is unlikely to help, and you’ll likely want to reinstall it from the repository instead. On the other hand, if the template is already broken or compromised, it won’t hurt to try reverting first. Just make sure to back up all of your data and changes first!
<template>. If you’ve already just shut it down, do not start it again (see above).
In a dom0 terminal:
qvm-volume revert <template>:root
Reinstall the template
Please see How to Reinstall a template.
This is like the simple revert, except:
- You must also revert the private volume with `qvm-volume revert :private`. This requires you to have an old revision of the private volume, which does not exist with the current default config. However, if you don't have anything important in the private volume (likely for a template), then you can work around this by just resetting the private volume with `qvm-volume import --no-resize :private /dev/null`.
- The saved revision of the volumes must be uncompromised. With the default
revisions_to_keep=1for the root volume, you must not have started the template since the compromising action.
Temporarily allowing networking for software installation
Some third-party applications cannot be installed using the standard repositories and need to be manually downloaded and installed. When the installation requires internet connection to access third-party repositories, it will naturally fail when run in a template because the default firewall rules for templates only allow connections from package managers. So it is necessary to modify firewall rules to allow less restrictive internet access for the time of the installation, if one really wants to install those applications into a template. As soon as software installation is completed, firewall rules should be returned back to the default state. The user should decide by themselves whether such third-party applications should be equally trusted as the ones that come from the standard Fedora signed repositories and whether their installation will not compromise the default template, and potentially consider installing them into a separate template or a standalone VM (in which case the problem of limited networking access doesn’t apply by default), as described above.
Updates proxy is a service which allows access only from package managers. This is meant to mitigate user errors (like using browser in the template), rather than some real isolation. It is done with http proxy (tinyproxy) instead of simple firewall rules because it is hard to list all the repository mirrors (and keep that list up to date). The proxy is used only to filter the traffic, not to cache anything.
The proxy is running in selected VMs (by default all the NetVMs (1)) and intercepts traffic directed to 10.137.255.254:8082. Thanks to such configuration all the VMs can use the same proxy address, and if there is a proxy on network path, it will handle the traffic (of course when firewall rules allow that). If the VM is configured to have access to the updates proxy (2), the startup scripts will automatically configure dnf to really use the proxy (3). Also access to updates proxy is independent of any other firewall settings (VM will have access to updates proxy, even if policy is set to block all the traffic).
There are two services (
qubes-updates-proxy(and its deprecated name:
qubes-yum-proxy) - a service providing a proxy for templates - by default enabled in NetVMs (especially: sys-net)
updates-proxy-setup(and its deprecated name:
yum-proxy-setup) - use a proxy provided by another VM (instead of downloading updates directly), enabled by default in all templates
Both the old and new names work. The defaults listed above are applied if the service is not explicitly listed in the services tab.
The updates proxy uses RPC/qrexec. The proxy is configured in qrexec policy in
/etc/qubes-rpc/policy/qubes.UpdatesProxy. By default this is set to
sys-net and/or sys-whonix, depending on firstboot choices. This new design
allows for templates to be updated even when they are not connected to any
Example policy file in R4.0 (with Whonix installed, but not set as default UpdateVM for all templates):
# any VM with tag `whonix-updatevm` should use `sys-whonix`; this tag is added to `whonix-gw` and `whonix-ws` during installation and is preserved during template clone @tag:whonix-updatevm @default allow,target=sys-whonix @tag:whonix-updatevm @anyvm deny # other templates use sys-net @type:template @default allow,target=sys-net @anyvm @anyvm deny
Installing Snap Packages
Snap packages do not use the normal update channels for Debian and Fedora (apt and dnf) and are often installed as the user rather than as root. To support these in an app qube you need to take the following steps:
In the template you must install
qubes-snapd-helper. Open a terminal in the template and run:
[user@fedora-30-snap-demo ~]$ sudo dnf install snapd qubes-snapd-helper Last metadata expiration check: 0:55:39 ago on Thu Nov 14 09:26:47 2019. Dependencies resolved. ======================================================================================================== Package Arch Version Repository Size ======================================================================================================== Installing: snapd x86_64 2.42.1-1.fc30 updates 17 M qubes-snapd-helper noarch 1.0.1-1.fc30 qubes-vm-r4.0-current 10 k Installing dependencies: [...] Transaction Summary ======================================================================================================== Install 20 Packages Total download size: 37 M Installed size: 121 M Is this ok [y/N]: y Downloading Packages: [..] Failed to resolve booleanif statement at /var/lib/selinux/targeted/tmp/modules/200/snappy/cil:1174 /usr/sbin/semodule: Failed! [...] Last metadata expiration check: 0:57:08 ago on Thu Nov 14 09:26:47 2019. Notifying dom0 about installed applications Installed: snapd-2.42.1-1.fc30.x86_64 qubes-snapd-helper-1.0.1-1.fc30.noarch [...] Complete!
You may see the following message:
Failed to resolve booleanif statement at /var/lib/selinux/targeted/tmp/modules/200/snappy/cil:1174 /usr/sbin/semodule: Failed!
This is expected and you can safely continue.
Shutdown the template:
[user@fedora-30-snap-demo ~]$ sudo shutdown -h now
Now open the app qube in which you would like to install the Snap application and run a terminal:
[user@snap-demo-app qube ~]$ snap install <package>
When the install is complete you can close the terminal window.
Refresh the Applications list for the app qube. In the Qubes Menu for the app qube* launch the Qube Settings. Then go to the Applications tab and click “Refresh Applications”
The refresh will take a few minutes; after it’s complete the Snap app will appear in the app qube’s list of available applications. At this point the snap will be persistent within the app qube and will receive updates when the app qube is running.
Autostarting Installed Applications
If you want a desktop app to start automatically every time a qube starts you
can create a link to it in the
~/.config/autostart directory of the app
qube. This might be useful for Qubes that you set to automatically start on
boot or for Qubes that have a set of apps you typically use all day, such as a
Open a terminal in the app qube where you would like the app to launch.
List the names of the available desktop shortcuts by running the command
ls /usr/share/applicationsand find the exact name of the shortcut to the app you want to autostart:
[user@example-app qube ~]$ ls /usr/share/applications/ bluetooth-sendto.desktop eog.desktop firefox.desktop ... xterm.desktop yelp.desktop
Create the autostart directory:
[user@example-app qube ~]$ mkdir -p ~/.config/autostart
Make a link to the desktop app file you’d like to start in the autostart directory. For example, the command below will link the Thunderbird app into the autostart directory:
[user@example-app qube ~]$ ln -s /usr/share/applications/mozilla-thunderbird.desktop ~/.config/autostart/mozilla-thunderbird.desktop
Note that the app will autostart only when the app qube starts. If you would like the app qube to autostart, select the “Start qube automatically on boot” checkbox in the app qube’s Qube Settings.