I've been downloaded a file from MonoDevelop website but it couldn't execute in my ubuntu, how to open that file?
filename is "monodevelop.flatpakref"
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Based on burhanuddin abbas comment there's a problem on Ubuntu 14.04.
Unable to locate package flatpak , because it is not supported for ubuntu 14.04 . Visit here for more details
sudo add-apt-repository ppa:alexlarsson/flatpak.
sudo apt update.
sudo apt install flatpak.
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo.
flatpak install monodevelop.flatpakref.
flatpak run com.xamarin.MonoDevelop (probably, not tested, based on @purlantov answer).
This is very helpfull Install MonoDevelop preview via FlatPak
It worked for me but any time that you want to start MonoDevelop you have to type in console:
flatpak run com.xamarin.MonoDevelop
And there is lot of things that do not work properly. I suggest you to compile it your self. This video help me a lot -> VIDEO
Unfortunately there is no longer pre-compiled package for Ubuntu.
A graphical way to install Flatpak app using .flatpakref file starts with installing flatpak plugin to add flatpak support into default software center.
For Debian-based GNOME desktop,
sudo apt install gnome-software-plugin-flatpak
For Debian-based KDE desktop,
sudo apt install plasma-discover-plugin-flatpak
You can change the package manager based on your supported Linux distro. However, most Linux distro comes with pre-configured support for Flatpak.
Now if you search for app in your software center, you'll notice two application one with source pointing to flathub repo i.e. flatpak app.
Nonetheless, if you've already downloaded the .flatpakref file, it's better to run a single command to install a flatpak app.
flatpak install --from <app-id>.flatpakref