Ubuntu :Installing Geogebra

I tried to install GeoGebra using flatpak.Just for

experiement i installed flatpak using apt

I was greeted with follwoing error when i run command to install geogebra.

Error:

sangram@sangram-Inspiron-14-5430:~$ flatpak install flathub org.geogebra.GeoGebra

Note that the directories

'/var/lib/flatpak/exports/share'

'/home/sangram/.local/share/flatpak/exports/share'

are not in the search path set by the XDG_DATA_DIRS environment variable, so

applications installed by Flatpak may not appear on your desktop until the

session is restarted.

Looking for matches…

error: No remote refs found for ‘flathub’

Solution:

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

Open bashrc file:

sudo nano ~/.bashrc

Add following line into it

export XDG_DATA_DIRS=$XDG_DATA_DIRS:/var/lib/flatpak/exports/share:/home/$USER/.local/share/flatpak/exports/share

Reload bashrc

source ~/.bashrc

verify that the Flathub remote was successfully added by listing Flatpak remotes:

flatpak remotes

Output:

Name Options

flathub system

Now I was able to install using following command

flatpak install flathub org.geogebra.GeoGebra

To launch it run

flatpak run org.geogebra.GeoGebra

If you want to remove this app then run

flatpak uninstall flathub org.geogebra.GeoGebra

Confirm it is deleted by seeing list of installed app

flatpak list