How to uninstall Atom text editor on Linux?

Atom may also be installed as a Snap. You can find out by using:

$ sudo snap list

If you see it in the list you can remove it with:

$ sudo snap remove atom

For more on snaps: https://www.ubuntu.com/desktop/snappy

If you installed atom using the .deb package, you can remove it using this command:

sudo apt-get remove atom

If you want to remove any config directories, you can use this command:

sudo apt-get purge atom

I have posted the same question in the Github Project Repository and this is the complete answer: https://github.com/atom/atom/issues/2195#issuecomment-42917489

The commands to execute are:

sudo rm /usr/local/bin/atom
sudo rm /usr/local/bin/apm
rm -rf ~/atom
rm -rf ~/.atom
rm -rf ~/.config/Atom-Shell
sudo rm -rf /usr/local/share/atom/

For Ubuntu 14.04 & Ubuntu 18.04, use the following:

sudo apt-get remove atom