Flatpak

Flatpak is a system for creating, distributing and running sandboxed desktop applications on Linux.

Installation from repository

Flatpak can be installed via terminal:

apt-get

su -
apt-get update
apt-get install flatpak

epm

epm -i flatpak

Log out and log back in, or restart the system to ensure that the flatpak paths are updated correctly.

Why is it necessary to log out after installing Flatpak

Please note that directories

'/var/lib/flatpak/exports/share'
'/home/oleg/.local/share/flatpak/exports/share'

are not in the search path specified by the XDG_DATA_DIRS environment variable,
so applications installed by Flatpak may not appear on the desktop until the
session is restarted.

Alternative Flatpak installation option

An alternative and more convenient way is to install the flatpak-repo-flathub package, when installing the package: the automatic package will perform all the above operations:

apt-get

su -
apt-get update
apt-get install flatpak-repo-flathub

epm

epm -i flatpak-repo-flathub

Информация

During the installation of the flatpak-repo-flathub package, the flathub repository will be connected

Installation using epm play

When installing via epm, flathub will be installed immediately, and a fix will be applied to fix the error: “enabling unprivileged user namespaces”

Информация

Current from version EPM 3.61.5

To install Flatpak using EPM, enter the command in the terminal

epm play flatpak

Using Flatpak

Basic commands needed to install, run, and manage Flatpak applications. For a complete list of Flatpak commands, run flatpak --help

Repository management

To view the repositories configured on your system, run:

flatpak remotes

Add a repository, run:

flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

In this case, flathub specifies the local name that is assigned to the remote device. The URL points to the remote device's .flatpakrepo file. The --if-not-exists option stops the command from throwing an error if the remote device already exists.

Most popular repositories

GNOME Nightly Repository:

flatpak remote-add --if-not-exists gnome-nightly https://nightly.gnome.org/gnome-nightly.flatpakrepo

Flatpak Beta Repository:

flatpak remote-add flathub-beta https://flathub.org/beta-repo/flathub-beta.flatpakrepo

To delete a repository, run:

flatpak remote-delete flathub

In this case, flathub is the local name of the remote repository.

Search applications

To search for an application/environment in Flatpak, use the search command:

flatpak search krita

Installing applications

To install the application, run:

flatpak install flathub org.gimp.GIMP

flathub is the identifier of the remote repository from which the application should be installed, and org.gimp.GIMP is the identifier of the application.

Typically, an application will require a specific runtime environment, and this will be installed before the application.

Information about the application being installed can also be provided in a .flatpakref file, which can be remote or local. To specify .flatpakref instead of manually specifying the remote device and application ID, run:

flatpak https://flathub.org/repo/appstream/org.gimp.GIMP.flatpakref

As of Flatpak 1.2, the install command can perform a pre-search before installing an application:

flatpak install gimp

Confirm remote access and the command will begin installing the required package.

In graphical mode, to install applications in Flatpak use App Center (GNOME Software). In the "Installed" tab, select the application in the list and click the "Install" button.

Launching applications

To run an application in Flatpak, use the run command and the application ID:

flatpak run org.gimp.GIMP

Uninstalling apps

To uninstall an application in Flatpak, use the uninstall command and the application ID:

flatpak uninstall org.gimp.GIMP

To remove runtimes and extensions that are not used by installed applications, use:

flatpak uninstall --unused

In graphical mode, to uninstall apps in Flatpak use App Center (GNOME Software). In the "Installed" tab, select the application in the list and click the "Delete" button.

Troubleshooting

To fix corrupt Flatpak packages, use:

flatpak repair

To see what changes have been made to your Flatpak installation over time, you can view the logs:

flatpak history