FLATPAK OVERRIDE(1)

NAME
flatpak-override - Override application requirements

SYNOPSIS

flatpak override [OPTION...] APP

DESCRIPTION

Overrides the application specified runtime requirements. This can be used to grant a sandboxed application more or less resources than it requested.

By default the application gets access to the resources it requested when it is started. But the user can override it on a particular instance by specifying extra arguments to flatpak run, or every time by using flatpak override.

Unless overridden with the --user or --installation options, this command changes the default system-wide installation.

OPTIONS

The following options are understood:

-h, --help
    Show help options and exit.

--user
    Update a per-user installation.

--system
    Update the default system-wide installation.

--installation=NAME
    Updates a system-wide installation specified by NAME among those defined in /etc/flatpak/installations.d. Using --installation=default is equivalent to using --system.

--share=SUBSYSTEM
    Share a subsystem with the host session. This overrides the Context section from the application metadata. SUBSYSTEM must be one of: network, ipc. This option can be used multiple times.

--unshare=SUBSYSTEM
    Don't share a subsystem with the host session. This overrides the Context section from the application metadata. SUBSYSTEM must be one of: network, ipc. This option can be used multiple times.

--socket=SOCKET
    Expose a well-known socket to the application. This overrides to the Context section from the application metadata. SOCKET must be one of: x11, wayland, pulseaudio, system-bus, session-bus. This option can be used multiple times.

--nosocket=SOCKET
    Don't expose a well-known socket to the application. This overrides to the Context section from the application metadata. SOCKET must be one of: x11, wayland, pulseaudio, system-bus, session-bus. This option can be used multiple times.

--device=DEVICE
    Expose a device to the application. This overrides to the Context section from the application metadata. DEVICE must be one of: dri, kvm, all. This option can be used multiple times.

--nodevice=DEVICE
    Don't expose a device to the application. This overrides to the Context section from the application metadata. DEVICE must be one of: dri, kvm, all. This option can be used multiple times.

--allow=FEATURE
    Allow access to a specific feature. This updates the [Context] group in the metadata. FEATURE must be one of: devel, multiarch. This option can be used multiple times.

    The devel feature allows the application to access certain syscalls such as ptrace(), and perf_event_open().

    The multiarch feature allows the application to execute programs compiled for an ABI other than the one supported natively by the system. For example, for the x86_64 architecture, 32-bit x86 binaries will be allowed as well.

--disallow=FEATURE
    Disallow access to a specific feature. This updates the [Context] group in the metadata. FEATURE must be one of: devel, multiarch. This option can be used multiple times.

--filesystem=FS
    Allow the application access to a subset of the filesystem. This overrides to the Context section from the application metadata. FS can be one of: home, host, xdg-desktop, xdg-documents, xdg-download xdg-music, xdg-pictures, xdg-public-share, xdg-templates, xdg-videos, xdg-run, xdg-config, xdg-cache, xdg-data, an absolute path, or a homedir-relative path like ~/dir or paths relative to the xdg dirs, like xdg-download/subdir. The optional :ro suffix indicates that the location will be read-only. The optional :create suffix indicates that the location will be read-write and created if it doesn't exist. This option can be used multiple times.

--nofilesystem=FILESYSTEM
    Remove access to the specified subset of the filesystem from the application. This overrides to the Context section from the application metadata. FILESYSTEM can be one of: home, host, xdg-desktop, xdg-documents, xdg-download xdg-music, xdg-pictures, xdg-public-share, xdg-templates, xdg-videos, an absolute path, or a homedir-relative path like ~/dir. This option can be used multiple times.

--add-policy=SUBSYSTEM.KEY=VALUE
    Add generic policy option. For example, "--add-policy=subsystem.key=v1 --add-policy=subsystem.key=v2" would map to this metadata:

        [Policy subsystem]
        key=v1;v2;

    This option can be used multiple times.

--remove-policy=SUBSYSTEM.KEY=VALUE
    Remove generic policy option. This option can be used multiple times.

--env=VAR=VALUE
    Set an environment variable in the application. This overrides to the Context section from the application metadata. This option can be used multiple times.

--own-name=NAME
    Allow the application to own the well-known name NAME on the session bus. This overrides to the Context section from the application metadata. This option can be used multiple times.

--talk-name=NAME
    Allow the application to talk to the well-known name NAME on the session bus. This overrides to the Context section from the application metadata. This option can be used multiple times.

--system-own-name=NAME
    Allow the application to own the well known name NAME on the system bus. If NAME ends with .*, it allows the application to own all matching names. This overrides to the Context section from the application metadata. This option can be used multiple times.

--system-talk-name=NAME
    Allow the application to talk to the well known name NAME on the system bus. If NAME ends with .*, it allows the application to talk to all matching names. This overrides to the Context section from the application metadata. This option can be used multiple times.

--persist=FILENAME
    If the application doesn't have access to the real homedir, make the (homedir-relative) path FILENAME a bind mount to the corresponding path in the per-application directory, allowing that location to be used for persistent data. This overrides to the Context section from the application metadata. This option can be used multiple times.

-v, --verbose
    Print debug information during command processing.

--version
    Print version information and exit.

EXAMPLES

$ flatpak override --nosocket=wayland org.gnome.GEdit

$ flatpak override --filesystem=home org.mozilla.Firefox

SEE ALSO

flatpak(1), flatpak-run(1)