Once you have snapd, you can
install Flutter using the Snap Store,
or at the command line:

sudo snap

install flutter

-classic

Note:
  Once you install the snap,
  use the following command to display your Flutter SDK path:

flutter sdk-path

Install Flutter manually

If you don’t have snapd, or can’t use it, you can
install Flutter using the following steps.

Download the following installation bundle to get the latest
stable release of the Flutter SDK:

    (loading…)

    For other release channels, and older builds,
see the SDK releases page.

Extract the file in the desired location, for example:

    
$ cd ~/development
$ tar xf ~/Downloads/flutter_linux_vX.X.X-stable.tar.xz