I am new to Linux (30 years MS user, it all began in DOS...) and have managed to install Xubuntu 18.04 (my first Linux install ever), and a few programs too, one of them is Atom text editor which was installed with some command line found on the internet, and apparently it was done with help of some "Flatpak package manager" (I learned only afterwards that there are several types of packet managers to assist user install a program on Linux, and that I had used one), now I would like to uninstall Atom text editor but I have not been able to do it.
The command line I used to install Atom looked like:
flatpak install flathub io.atom.Atom
(Obs! while installing, Xubuntu complained and so some additional Flatpak utilities had to also be installed in order to finalize the Atom installation.)
Anyhow, while searching for ways of uninstalling the program I found another string for listing programs installed with Flatpak, that looked like this:
flatpak list -d --app --runtime
And it put out the following line:
io.atom.Atom/x86_64/stable flathub 1e5c659b47a2 - 551,2 MB system,current
I copied part of that string associated with Atom and used it in an uninstall command line that looked like this, with the error message following it:
flatpak --user uninstall io.atom.Atom error: io.atom.Atom/*unspecified*/*unspecified* not installed
What should the uninstall command line look like in order to uninstall Atom text editor?