Update Atom Editor to the latest version in Ubuntu

atom-update.fish

function atom-url;
  curl -s https://api.github.com/repos/atom/atom/releases/latest | awk '/browser_download_url.*deb/ { print $2 }' | sed 's/"//g'
end;
function atom-download;
  curl -LOk (atom-url)
end;
function atom-install;
  sudo dpkg -i ./atom-amd64.deb
end;

First, you need to add the snippets to your fish config.

curl -sL https://gist.github.com/belchior/d06c48a6182a9346145789d297a0178c/raw/atom-update.fish >> ~/.config/fish/config.fish

And then reload your config

source ~/.config/fish/config.fish

Now you are ready to use the commands

atom-url; # will show you the URL of the latest version of Atom
atom-download; # will download the package
atom-install # will install the package

At the future you only need to execute the above commands to make Atom updated

atom-download;
atom-install;